640080415736 has 16 divisors (see below), whose sum is σ = 1200180353400. Its totient is φ = 320032321504.

The previous prime is 640080415673. The next prime is 640080415753. The reversal of 640080415736 is 637514080046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633446 + ... + 1296693.

Almost surely, 2^640080415736 is an apocalyptic number.

It is an amenable number.

640080415736 is a deficient number, since it is larger than the sum of its proper divisors (560099937664).

640080415736 is a wasteful number, since it uses less digits than its factorization.

640080415736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971598 (or 1971594 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 640080415736 in words is "six hundred forty billion, eighty million, four hundred fifteen thousand, seven hundred thirty-six".