51572150868 has 48 divisors (see below), whose sum is σ = 139856693760. Its totient is φ = 14485154784.

The previous prime is 51572150857. The next prime is 51572150869. The reversal of 51572150868 is 86805127515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51572150869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5198046 + ... + 5207957.

It is an arithmetic number, because the mean of its divisors is an integer number (2913681120).

Almost surely, 2^51572150868 is an apocalyptic number.

It is an amenable number.

51572150868 is an abundant number, since it is smaller than the sum of its proper divisors (88284542892).

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

51572150868 is a wasteful number, since it uses less digits than its factorization.

51572150868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10406076 (or 10406074 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 48.

The spelling of 51572150868 in words is "fifty-one billion, five hundred seventy-two million, one hundred fifty thousand, eight hundred sixty-eight".