51576721772 has 12 divisors (see below), whose sum is σ = 94183579056. Its totient is φ = 24667127760.

The previous prime is 51576721741. The next prime is 51576721811. The reversal of 51576721772 is 27712767515.

It is a self number, because there is not a number n which added to its sum of digits gives 51576721772.

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, 280308179 + ... + 280308362.

It is an arithmetic number, because the mean of its divisors is an integer number (7848631588).

Almost surely, 2^51576721772 is an apocalyptic number.

It is an amenable number.

51576721772 is a deficient number, since it is larger than the sum of its proper divisors (42606857284).

51576721772 is a wasteful number, since it uses less digits than its factorization.

51576721772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560616568 (or 560616566 counting only the distinct ones).

The product of its digits is 1440600, while the sum is 50.

The spelling of 51576721772 in words is "fifty-one billion, five hundred seventy-six million, seven hundred twenty-one thousand, seven hundred seventy-two".