64091810632656 has 20 divisors (see below), whose sum is σ = 165570510801152. Its totient is φ = 21363936877536.

The previous prime is 64091810632631. The next prime is 64091810632669. The reversal of 64091810632656 is 65623601819046.

It is a super-2 number, since 2×64091810632656² (a number of 28 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64091810632596 and 64091810632605.

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, 667623027376 + ... + 667623027471.

Almost surely, 2^{64091810632656} is an apocalyptic number.

It is an amenable number.

64091810632656 is an abundant number, since it is smaller than the sum of its proper divisors (101478700168496).

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

64091810632656 is a wasteful number, since it uses less digits than its factorization.

64091810632656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335246054858 (or 1335246054852 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 57.

The spelling of 64091810632656 in words is "sixty-four trillion, ninety-one billion, eight hundred ten million, six hundred thirty-two thousand, six hundred fifty-six".