51390422180 has 24 divisors (see below), whose sum is σ = 108016549368. Its totient is φ = 20537756928.

The previous prime is 51390422177. The next prime is 51390422203. The reversal of 51390422180 is 8122409315.

It can be written as a sum of positive squares in 4 ways, for example, as 1940226304 + 49450195876 = 44048^2 + 222374^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51390422180.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1127849 + ... + 1172528.

It is an arithmetic number, because the mean of its divisors is an integer number (4500689557).

Almost surely, 2^51390422180 is an apocalyptic number.

It is an amenable number.

51390422180 is an abundant number, since it is smaller than the sum of its proper divisors (56626127188).

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

51390422180 is a wasteful number, since it uses less digits than its factorization.

51390422180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301503 (or 2301501 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 51390422180 in words is "fifty-one billion, three hundred ninety million, four hundred twenty-two thousand, one hundred eighty".