51647578572 has 24 divisors (see below), whose sum is σ = 120939889392. Its totient is φ = 17154592000.

The previous prime is 51647578561. The next prime is 51647578627. The reversal of 51647578572 is 27587574615.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7654929 + ... + 7661672.

It is an arithmetic number, because the mean of its divisors is an integer number (5039162058).

Almost surely, 2^51647578572 is an apocalyptic number.

It is an amenable number.

51647578572 is an abundant number, since it is smaller than the sum of its proper divisors (69292310820).

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

51647578572 is a wasteful number, since it uses less digits than its factorization.

51647578572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15316889 (or 15316887 counting only the distinct ones).

The product of its digits is 16464000, while the sum is 57.

The spelling of 51647578572 in words is "fifty-one billion, six hundred forty-seven million, five hundred seventy-eight thousand, five hundred seventy-two".