51636364565444 has 24 divisors (see below), whose sum is σ = 95886693119448. Its totient is φ = 24246755325440.

The previous prime is 51636364565417. The next prime is 51636364565497. The reversal of 51636364565444 is 44456546363615.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23794279131844 + 27842085433600 = 4877938^2 + 5276560^2 .

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, 823567679 + ... + 823630374.

It is an arithmetic number, because the mean of its divisors is an integer number (3995278879977).

Almost surely, 2^{51636364565444} is an apocalyptic number.

It is an amenable number.

51636364565444 is a deficient number, since it is larger than the sum of its proper divisors (44250328554004).

51636364565444 is a wasteful number, since it uses less digits than its factorization.

51636364565444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647198535 (or 1647198533 counting only the distinct ones).

The product of its digits is 373248000, while the sum is 62.

The spelling of 51636364565444 in words is "fifty-one trillion, six hundred thirty-six billion, three hundred sixty-four million, five hundred sixty-five thousand, four hundred forty-four".