56521150640 has 40 divisors (see below), whose sum is σ = 133565976528. Its totient is φ = 22237827840.

The previous prime is 56521150607. The next prime is 56521150663. The reversal of 56521150640 is 4605112565.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 56521150640.

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, 5786222 + ... + 5795981.

Almost surely, 2^56521150640 is an apocalyptic number.

It is an amenable number.

56521150640 is an abundant number, since it is smaller than the sum of its proper divisors (77044825888).

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

56521150640 is a wasteful number, since it uses less digits than its factorization.

56521150640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11582277 (or 11582271 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 56521150640 in words is "fifty-six billion, five hundred twenty-one million, one hundred fifty thousand, six hundred forty".