51314776420 has 36 divisors (see below), whose sum is σ = 114472803060. Its totient is φ = 19318501888.

The previous prime is 51314776417. The next prime is 51314776453. The reversal of 51314776420 is 2467741315.

It can be written as a sum of positive squares in 6 ways, for example, as 4838315364 + 46476461056 = 69558^2 + 215584^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4433215 + ... + 4444774.

It is an arithmetic number, because the mean of its divisors is an integer number (3179800085).

Almost surely, 2^51314776420 is an apocalyptic number.

It is an amenable number.

51314776420 is an abundant number, since it is smaller than the sum of its proper divisors (63158026640).

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

51314776420 is a wasteful number, since it uses less digits than its factorization.

51314776420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8878032 (or 8878013 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 51314776420 in words is "fifty-one billion, three hundred fourteen million, seven hundred seventy-six thousand, four hundred twenty".