51379997922 has 90 divisors (see below), whose sum is σ = 126625243899. Its totient is φ = 15560079480.

The previous prime is 51379997909. The next prime is 51379998013. The reversal of 51379997922 is 22979997315.

51379997922 is a `hidden beast` number, since 513 + 7 + 9 + 9 + 97 + 9 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25689998961 + 25689998961 = 160281^2 + 160281^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=160281.

It is a self number, because there is not a number n which added to its sum of digits gives 51379997922.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 31734829 + ... + 31736447.

Almost surely, 2^51379997922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51379997922

51379997922 is an abundant number, since it is smaller than the sum of its proper divisors (75245245977).

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

51379997922 is an equidigital number, since it uses as much as digits as its factorization.

51379997922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274 (or 1635 counting only the distinct ones).

The product of its digits is 19289340, while the sum is 63.

The spelling of 51379997922 in words is "fifty-one billion, three hundred seventy-nine million, nine hundred ninety-seven thousand, nine hundred twenty-two".