51012575808 has 56 divisors (see below), whose sum is σ = 136307169600. Its totient is φ = 16835827200.

The previous prime is 51012575807. The next prime is 51012575833. The reversal of 51012575808 is 80857521015.

It is a self number, because there is not a number n which added to its sum of digits gives 51012575808.

It is not an unprimeable number, because it can be changed into a prime (51012575807) 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 7 ways as a sum of consecutive naturals, for example, 1295908 + ... + 1334691.

It is an arithmetic number, because the mean of its divisors is an integer number (2434056600).

Almost surely, 2^51012575808 is an apocalyptic number.

It is an amenable number.

51012575808 is an abundant number, since it is smaller than the sum of its proper divisors (85294593792).

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

51012575808 is a wasteful number, since it uses less digits than its factorization.

51012575808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630715 (or 2630705 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 42.

The spelling of 51012575808 in words is "fifty-one billion, twelve million, five hundred seventy-five thousand, eight hundred eight".