64621604236 has 24 divisors (see below), whose sum is σ = 129526042016. Its totient is φ = 27634366080.

The previous prime is 64621604207. The next prime is 64621604251. The reversal of 64621604236 is 63240612646.

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, 2512275 + ... + 2537866.

Almost surely, 2^64621604236 is an apocalyptic number.

It is an amenable number.

64621604236 is an abundant number, since it is smaller than the sum of its proper divisors (64904437780).

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

64621604236 is a wasteful number, since it uses less digits than its factorization.

64621604236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050609 (or 5050607 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 64621604236 in words is "sixty-four billion, six hundred twenty-one million, six hundred four thousand, two hundred thirty-six".