640880895096 has 80 divisors (see below), whose sum is σ = 1933141471800. Its totient is φ = 197194118976.

The previous prime is 640880895059. The next prime is 640880895131. The reversal of 640880895096 is 690598088046.

640880895096 is a `hidden beast` number, since 6 + 40 + 8 + 8 + 0 + 89 + 509 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38030566 + ... + 38047413.

Almost surely, 2^640880895096 is an apocalyptic number.

It is an amenable number.

640880895096 is an abundant number, since it is smaller than the sum of its proper divisors (1292260576704).

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

640880895096 is a wasteful number, since it uses less digits than its factorization.

640880895096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76078010 (or 76077997 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The spelling of 640880895096 in words is "six hundred forty billion, eight hundred eighty million, eight hundred ninety-five thousand, ninety-six".