640675795036 has 24 divisors (see below), whose sum is σ = 1158819215456. Its totient is φ = 309694881600.

The previous prime is 640675795021. The next prime is 640675795049. The reversal of 640675795036 is 630597576046.

It is a happy number.

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, 13763040 + ... + 13809511.

Almost surely, 2^640675795036 is an apocalyptic number.

It is an amenable number.

640675795036 is a deficient number, since it is larger than the sum of its proper divisors (518143420420).

640675795036 is a wasteful number, since it uses less digits than its factorization.

640675795036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27572749 (or 27572747 counting only the distinct ones).

The product of its (nonzero) digits is 28576800, while the sum is 58.

The spelling of 640675795036 in words is "six hundred forty billion, six hundred seventy-five million, seven hundred ninety-five thousand, thirty-six".