51855976772 has 12 divisors (see below), whose sum is σ = 90775473516. Its totient is φ = 25920127200.

The previous prime is 51855976769. The next prime is 51855976787. The reversal of 51855976772 is 27767955815.

It can be written as a sum of positive squares in 2 ways, for example, as 13984481536 + 37871495236 = 118256^2 + 194606^2 .

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, 1950443 + ... + 1976850.

It is an arithmetic number, because the mean of its divisors is an integer number (7564622793).

Almost surely, 2^51855976772 is an apocalyptic number.

It is an amenable number.

51855976772 is a deficient number, since it is larger than the sum of its proper divisors (38919496744).

51855976772 is a wasteful number, since it uses less digits than its factorization.

51855976772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930598 (or 3930596 counting only the distinct ones).

The product of its digits is 37044000, while the sum is 62.

The spelling of 51855976772 in words is "fifty-one billion, eight hundred fifty-five million, nine hundred seventy-six thousand, seven hundred seventy-two".