40564521564 has 24 divisors (see below), whose sum is σ = 108172057728. Its totient is φ = 11589863280.

The previous prime is 40564521553. The next prime is 40564521589. The reversal of 40564521564 is 46512546504.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241455402 + ... + 241455569.

It is an arithmetic number, because the mean of its divisors is an integer number (4507169072).

Almost surely, 2^40564521564 is an apocalyptic number.

It is an amenable number.

40564521564 is an abundant number, since it is smaller than the sum of its proper divisors (67607536164).

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

40564521564 is a wasteful number, since it uses less digits than its factorization.

40564521564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482910985 (or 482910983 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 40564521564 in words is "forty billion, five hundred sixty-four million, five hundred twenty-one thousand, five hundred sixty-four".