64520440632604 has 36 divisors (see below), whose sum is σ = 130847210078760. Its totient is φ = 27602327537920.

The previous prime is 64520440632581. The next prime is 64520440632667. The reversal of 64520440632604 is 40623604402546.

It is a congruent number.

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, 2536965919 + ... + 2536991350.

It is an arithmetic number, because the mean of its divisors is an integer number (3634644724410).

Almost surely, 2^{64520440632604} is an apocalyptic number.

It is an amenable number.

64520440632604 is an abundant number, since it is smaller than the sum of its proper divisors (66326769446156).

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

64520440632604 is a wasteful number, since it uses less digits than its factorization.

64520440632604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5073957318 (or 5073957299 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 46.

The spelling of 64520440632604 in words is "sixty-four trillion, five hundred twenty billion, four hundred forty million, six hundred thirty-two thousand, six hundred four".