Search a number
81474680808132 = 2236789556734011
BaseRepresentation
bin10010100001100111001101…
…011010000110001011000100
3101200110220101120221221121120
4102201213031122012023010
541134340121241330012
6445140541320113540
723106231354143103
oct2241471532061304
9350426346857546
1081474680808132
1123a62244303977
12917a4099058b0
13366004c884b91
14161957770a03a
159645240b058c
hex4a19cd6862c4

81474680808132 has 12 divisors (see below), whose sum is σ = 190107588552336. Its totient is φ = 27158226936040.

The previous prime is 81474680808113. The next prime is 81474680808179. The reversal of 81474680808132 is 23180808647418.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×814746808081322 (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3394778366994 + ... + 3394778367017.

It is an arithmetic number, because the mean of its divisors is an integer number (15842299046028).

Almost surely, 281474680808132 is an apocalyptic number.

It is an amenable number.

81474680808132 is an abundant number, since it is smaller than the sum of its proper divisors (108632907744204).

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

81474680808132 is a wasteful number, since it uses less digits than its factorization.

81474680808132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6789556734018 (or 6789556734016 counting only the distinct ones).

The product of its (nonzero) digits is 16515072, while the sum is 60.

The spelling of 81474680808132 in words is "eighty-one trillion, four hundred seventy-four billion, six hundred eighty million, eight hundred eight thousand, one hundred thirty-two".