51420344177544 has 32 divisors (see below), whose sum is σ = 128696775207840. Its totient is φ = 17120659424000.

The previous prime is 51420344177483. The next prime is 51420344177561. The reversal of 51420344177544 is 44577144302415.

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, 1215934782 + ... + 1215977069.

It is an arithmetic number, because the mean of its divisors is an integer number (4021774225245).

Almost surely, 2^{51420344177544} is an apocalyptic number.

It is an amenable number.

51420344177544 is an abundant number, since it is smaller than the sum of its proper divisors (77276431030296).

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

51420344177544 is a wasteful number, since it uses less digits than its factorization.

51420344177544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431912741 (or 2431912737 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 51.

Adding to 51420344177544 its reverse (44577144302415), we get a palindrome (95997488479959).

The spelling of 51420344177544 in words is "fifty-one trillion, four hundred twenty billion, three hundred forty-four million, one hundred seventy-seven thousand, five hundred forty-four".