157061663640 has 96 divisors (see below), whose sum is σ = 583371902880. Its totient is φ = 35899808256.

The previous prime is 157061663617. The next prime is 157061663641. The reversal of 157061663640 is 46366160751.

157061663640 is a `hidden beast` number, since 1 + 5 + 7 + 0 + 6 + 1 + 6 + 636 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157061663641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31160509 + ... + 31165548.

It is an arithmetic number, because the mean of its divisors is an integer number (6076790655).

Almost surely, 2^157061663640 is an apocalyptic number.

157061663640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157061663640 is an abundant number, since it is smaller than the sum of its proper divisors (426310239240).

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

157061663640 is a wasteful number, since it uses less digits than its factorization.

157061663640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62326081 (or 62326074 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 157061663640 in words is "one hundred fifty-seven billion, sixty-one million, six hundred sixty-three thousand, six hundred forty".