64520908404 has 24 divisors (see below), whose sum is σ = 150552991680. Its totient is φ = 21506368704.

The previous prime is 64520908381. The next prime is 64520908429. The reversal of 64520908404 is 40480902546.

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, 661017 + ... + 752319.

It is an arithmetic number, because the mean of its divisors is an integer number (6273041320).

Almost surely, 2^64520908404 is an apocalyptic number.

It is an amenable number.

64520908404 is an abundant number, since it is smaller than the sum of its proper divisors (86032083276).

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

64520908404 is a wasteful number, since it uses less digits than its factorization.

64520908404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150199 (or 150197 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 64520908404 in words is "sixty-four billion, five hundred twenty million, nine hundred eight thousand, four hundred four".