23457977640 has 48 divisors (see below), whose sum is σ = 76238428500. Its totient is φ = 6255460608.

The previous prime is 23457977639. The next prime is 23457977681. The reversal of 23457977640 is 4677975432.

23457977640 is a `hidden beast` number, since 2 + 3 + 4 + 579 + 7 + 7 + 64 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22322152836 + 1135824804 = 149406^2 + 33702^2 .

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, 32580165 + ... + 32580884.

Almost surely, 2^23457977640 is an apocalyptic number.

23457977640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23457977640 is an abundant number, since it is smaller than the sum of its proper divisors (52780450860).

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

23457977640 is a wasteful number, since it uses less digits than its factorization.

23457977640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65161066 (or 65161059 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 54.

The spelling of 23457977640 in words is "twenty-three billion, four hundred fifty-seven million, nine hundred seventy-seven thousand, six hundred forty".