51090540972 has 48 divisors (see below), whose sum is σ = 121648713984. Its totient is φ = 16684200000.

The previous prime is 51090540901. The next prime is 51090541067. The reversal of 51090540972 is 27904509015.

It is a super-2 number, since 2×51090540972² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44697 + ... + 322767.

It is an arithmetic number, because the mean of its divisors is an integer number (2534348208).

Almost surely, 2^51090540972 is an apocalyptic number.

It is an amenable number.

51090540972 is an abundant number, since it is smaller than the sum of its proper divisors (70558173012).

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

51090540972 is a wasteful number, since it uses less digits than its factorization.

51090540972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278390 (or 278388 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 42.

The spelling of 51090540972 in words is "fifty-one billion, ninety million, five hundred forty thousand, nine hundred seventy-two".