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68996751080 = 2356128277357
BaseRepresentation
bin100000001000010000…
…1101101111011101000
320121002111120010002012
41000100201231323220
52112301132013310
651410251455052
74661542464455
oct1002041557350
9217074503065
1068996751080
112729695a334
1211456a57488
13667764073a
1434a76a082c
151bdc4dbc05
hex101086dee8

68996751080 has 32 divisors (see below), whose sum is σ = 157787657640. Its totient is φ = 27146261760.

The previous prime is 68996751079. The next prime is 68996751091. The reversal of 68996751080 is 8015769986.

It can be written as a sum of positive squares in 4 ways, for example, as 21689631076 + 47307120004 = 147274^2 + 217502^2 .

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14136239 + ... + 14141118.

Almost surely, 268996751080 is an apocalyptic number.

It is an amenable number.

68996751080 is an abundant number, since it is smaller than the sum of its proper divisors (88790906560).

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

68996751080 is a wasteful number, since it uses less digits than its factorization.

68996751080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28277429 (or 28277425 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 59.

The spelling of 68996751080 in words is "sixty-eight billion, nine hundred ninety-six million, seven hundred fifty-one thousand, eighty".

Divisors: 1 2 4 5 8 10 20 40 61 122 244 305 488 610 1220 2440 28277357 56554714 113109428 141386785 226218856 282773570 565547140 1131094280 1724918777 3449837554 6899675108 8624593885 13799350216 17249187770 34498375540 68996751080