51268730208 has 48 divisors (see below), whose sum is σ = 134668025856. Its totient is φ = 17078451840.

The previous prime is 51268730179. The next prime is 51268730239. The reversal of 51268730208 is 80203786215.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51268730208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24928 + ... + 321183.

It is an arithmetic number, because the mean of its divisors is an integer number (2805583872).

Almost surely, 2^51268730208 is an apocalyptic number.

It is an amenable number.

51268730208 is an abundant number, since it is smaller than the sum of its proper divisors (83399295648).

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

51268730208 is a wasteful number, since it uses less digits than its factorization.

51268730208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347667 (or 347659 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 51268730208 in words is "fifty-one billion, two hundred sixty-eight million, seven hundred thirty thousand, two hundred eight".