640501562565056 has 14 divisors (see below), whose sum is σ = 1270995288215160. Its totient is φ = 320250781282496.

The previous prime is 640501562565023. The next prime is 640501562565077. The reversal of 640501562565056 is 650565265105046.

It is a junction number, because it is equal to n+sod(n) for n = 640501562564992 and 640501562565010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003918457476 + ... + 5003918457603.

Almost surely, 2^{640501562565056} is an apocalyptic number.

It is an amenable number.

640501562565056 is a deficient number, since it is larger than the sum of its proper divisors (630493725650104).

640501562565056 is a wasteful number, since it uses less digits than its factorization.

640501562565056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10007836915091 (or 10007836915081 counting only the distinct ones).

The product of its (nonzero) digits is 32400000, while the sum is 56.

The spelling of 640501562565056 in words is "six hundred forty trillion, five hundred one billion, five hundred sixty-two million, five hundred sixty-five thousand, fifty-six".