51869842680 has 128 divisors (see below), whose sum is σ = 168226790400. Its totient is φ = 12749778432.

The previous prime is 51869842679. The next prime is 51869842693. The reversal of 51869842680 is 8624896815.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 51869842680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223072 + ... + 391791.

It is an arithmetic number, because the mean of its divisors is an integer number (1314271800).

Almost surely, 2^51869842680 is an apocalyptic number.

It is an amenable number.

51869842680 is an abundant number, since it is smaller than the sum of its proper divisors (116356947720).

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

51869842680 is a wasteful number, since it uses less digits than its factorization.

51869842680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614933 (or 614929 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 57.

The spelling of 51869842680 in words is "fifty-one billion, eight hundred sixty-nine million, eight hundred forty-two thousand, six hundred eighty".