51420361430538 has 48 divisors (see below), whose sum is σ = 111912904696320. Its totient is φ = 17062874466912.

The previous prime is 51420361430491. The next prime is 51420361430549. The reversal of 51420361430538 is 83503416302415.

51420361430538 is a `hidden beast` number, since 5 + 1 + 4 + 20 + 3 + 61 + 4 + 30 + 538 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 51420361430493 and 51420361430502.

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 23 ways as a sum of consecutive naturals, for example, 219741883 + ... + 219975761.

It is an arithmetic number, because the mean of its divisors is an integer number (2331518847840).

Almost surely, 2^{51420361430538} is an apocalyptic number.

51420361430538 is an abundant number, since it is smaller than the sum of its proper divisors (60492543265782).

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

51420361430538 is a wasteful number, since it uses less digits than its factorization.

51420361430538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288883 (or 288880 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 51420361430538 in words is "fifty-one trillion, four hundred twenty billion, three hundred sixty-one million, four hundred thirty thousand, five hundred thirty-eight".