157658227172172 has 36 divisors (see below), whose sum is σ = 398545998524856. Its totient is φ = 52549968492480.

The previous prime is 157658227172161. The next prime is 157658227172197. The reversal of 157658227172172 is 271271722856751.

It is a happy number.

157658227172172 is a `hidden beast` number, since 1 + 5 + 7 + 6 + 582 + 27 + 1 + 7 + 21 + 7 + 2 = 666.

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

It is a super-2 number, since 2×157658227172172² (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 11 ways as a sum of consecutive naturals, for example, 114887529 + ... + 116251712.

It is an arithmetic number, because the mean of its divisors is an integer number (11070722181246).

Almost surely, 2^{157658227172172} is an apocalyptic number.

157658227172172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157658227172172 is an abundant number, since it is smaller than the sum of its proper divisors (240887771352684).

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

157658227172172 is a wasteful number, since it uses less digits than its factorization.

157658227172172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231158198 (or 231158193 counting only the distinct ones).

The product of its digits is 46099200, while the sum is 63.

The spelling of 157658227172172 in words is "one hundred fifty-seven trillion, six hundred fifty-eight billion, two hundred twenty-seven million, one hundred seventy-two thousand, one hundred seventy-two".