23540025564 has 72 divisors (see below), whose sum is σ = 65424672768. Its totient is φ = 7077157920.

The previous prime is 23540025563. The next prime is 23540025583. The reversal of 23540025564 is 46552004532.

23540025564 is a `hidden beast` number, since 2 + 3 + 540 + 0 + 2 + 55 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23540025563) 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, 183742 + ... + 284325.

Almost surely, 2^23540025564 is an apocalyptic number.

It is an amenable number.

23540025564 is an abundant number, since it is smaller than the sum of its proper divisors (41884647204).

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

23540025564 is a wasteful number, since it uses less digits than its factorization.

23540025564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468215 (or 468210 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The spelling of 23540025564 in words is "twenty-three billion, five hundred forty million, twenty-five thousand, five hundred sixty-four".