647564643796 has 12 divisors (see below), whose sum is σ = 1295129287648. Its totient is φ = 277527704472.

The previous prime is 647564643757. The next prime is 647564643809. The reversal of 647564643796 is 697346465746.

647564643796 is an admirable number.

It is a super-2 number, since 2×647564643796² (a number of 24 digits) contains 22 as substring.

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, 11563654326 + ... + 11563654381.

Almost surely, 2^647564643796 is an apocalyptic number.

It is an amenable number.

647564643796 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

647564643796 is a wasteful number, since it uses less digits than its factorization.

647564643796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23127308718 (or 23127308716 counting only the distinct ones).

The product of its digits is 548674560, while the sum is 67.

The spelling of 647564643796 in words is "six hundred forty-seven billion, five hundred sixty-four million, six hundred forty-three thousand, seven hundred ninety-six".