51647578564 has 48 divisors (see below), whose sum is σ = 93418617600. Its totient is φ = 24975216000.

The previous prime is 51647578561. The next prime is 51647578627. The reversal of 51647578564 is 46587574615.

It is a junction number, because it is equal to n+sod(n) for n = 51647578499 and 51647578508.

It is not an unprimeable number, because it can be changed into a prime (51647578561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3118297 + ... + 3134815.

It is an arithmetic number, because the mean of its divisors is an integer number (1946221200).

Almost surely, 2^51647578564 is an apocalyptic number.

It is an amenable number.

51647578564 is a deficient number, since it is larger than the sum of its proper divisors (41771039036).

51647578564 is a wasteful number, since it uses less digits than its factorization.

51647578564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16804 (or 16802 counting only the distinct ones).

The product of its digits is 28224000, while the sum is 58.

The spelling of 51647578564 in words is "fifty-one billion, six hundred forty-seven million, five hundred seventy-eight thousand, five hundred sixty-four".