51572816812 has 48 divisors (see below), whose sum is σ = 101754132480. Its totient is φ = 22659004800.

The previous prime is 51572816807. The next prime is 51572816833. The reversal of 51572816812 is 21861827515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1146889 + ... + 1191007.

It is an arithmetic number, because the mean of its divisors is an integer number (2119877760).

Almost surely, 2^51572816812 is an apocalyptic number.

It is an amenable number.

51572816812 is a deficient number, since it is larger than the sum of its proper divisors (50181315668).

51572816812 is a wasteful number, since it uses less digits than its factorization.

51572816812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45022 (or 45020 counting only the distinct ones).

The product of its digits is 268800, while the sum is 46.

The spelling of 51572816812 in words is "fifty-one billion, five hundred seventy-two million, eight hundred sixteen thousand, eight hundred twelve".