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142881687841580 = 22523793931802087
BaseRepresentation
bin100000011111001100111100…
…001111111010101100101100
3200201220100121111022102220222
4200133030330033322230230
5122211433144041412310
61223514535150230512
742044601264553532
oct4037147417725454
9621810544272828
10142881687841580
11415878689611a6
12140375181b5438
1361958ba93666c
14273d7210ba152
15117ba3202b055
hex81f33c3fab2c

142881687841580 has 48 divisors (see below), whose sum is σ = 317060520376320. Its totient is φ = 53975779036608.

The previous prime is 142881687841531. The next prime is 142881687841589. The reversal of 142881687841580 is 85148786188241.

It is a happy number.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (142881687841589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1965864704 + ... + 1965937383.

It is an arithmetic number, because the mean of its divisors is an integer number (6605427507840).

Almost surely, 2142881687841580 is an apocalyptic number.

142881687841580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142881687841580 is an abundant number, since it is smaller than the sum of its proper divisors (174178832534740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142881687841580 is a wasteful number, since it uses less digits than its factorization.

142881687841580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931802198 (or 3931802196 counting only the distinct ones).

The product of its (nonzero) digits is 220200960, while the sum is 71.

The spelling of 142881687841580 in words is "one hundred forty-two trillion, eight hundred eighty-one billion, six hundred eighty-seven million, eight hundred forty-one thousand, five hundred eighty".

Divisors: 1 2 4 5 10 20 23 46 79 92 115 158 230 316 395 460 790 1580 1817 3634 7268 9085 18170 36340 3931802087 7863604174 15727208348 19659010435 39318020870 78636041740 90431448001 180862896002 310612364873 361725792004 452157240005 621224729746 904314480010 1242449459492 1553061824365 1808628960020 3106123648730 6212247297460 7144084392079 14288168784158 28576337568316 35720421960395 71440843920790 142881687841580