646806535788 has 96 divisors (see below), whose sum is σ = 1864667660800. Its totient is φ = 170343668736.

The previous prime is 646806535717. The next prime is 646806535799. The reversal of 646806535788 is 887535608646.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5417533 + ... + 5535636.

Almost surely, 2^646806535788 is an apocalyptic number.

It is an amenable number.

646806535788 is an abundant number, since it is smaller than the sum of its proper divisors (1217861125012).

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

646806535788 is a wasteful number, since it uses less digits than its factorization.

646806535788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10953239 (or 10953237 counting only the distinct ones).

The product of its (nonzero) digits is 232243200, while the sum is 66.

The spelling of 646806535788 in words is "six hundred forty-six billion, eight hundred six million, five hundred thirty-five thousand, seven hundred eighty-eight".