137640608172 has 36 divisors (see below), whose sum is σ = 359922282720. Its totient is φ = 44298126432.

The previous prime is 137640608113. The next prime is 137640608173. The reversal of 137640608172 is 271806046731.

137640608172 is a `hidden beast` number, since 1 + 3 + 76 + 406 + 0 + 8 + 172 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (137640608173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65918788 + ... + 65920875.

Almost surely, 2^137640608172 is an apocalyptic number.

137640608172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

137640608172 is an abundant number, since it is smaller than the sum of its proper divisors (222281674548).

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

137640608172 is a wasteful number, since it uses less digits than its factorization.

137640608172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131839702 (or 131839697 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 137640608172 in words is "one hundred thirty-seven billion, six hundred forty million, six hundred eight thousand, one hundred seventy-two".