640510004236 has 6 divisors (see below), whose sum is σ = 1120892507420. Its totient is φ = 320255002116.

The previous prime is 640510004221. The next prime is 640510004261. The reversal of 640510004236 is 632400015046.

It is a junction number, because it is equal to n+sod(n) for n = 640510004198 and 640510004207.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80063750526 + ... + 80063750533.

Almost surely, 2^640510004236 is an apocalyptic number.

It is an amenable number.

640510004236 is a deficient number, since it is larger than the sum of its proper divisors (480382503184).

640510004236 is a wasteful number, since it uses less digits than its factorization.

640510004236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160127501063 (or 160127501061 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 640510004236 in words is "six hundred forty billion, five hundred ten million, four thousand, two hundred thirty-six".