51579558335881 has 3 divisors (see below), whose sum is σ = 51579565517773. Its totient is φ = 51579551153990.

The previous prime is 51579558335863. The next prime is 51579558335891. The reversal of 51579558335881 is 18853385597515.

The square root of 51579558335881 is 7181891.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 51579558335881 - 2²¹ = 51579556238729 is a prime.

It is a super-2 number, since 2×51579558335881² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51579558335891) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3590946 + ... + 10772836.

Almost surely, 2^{51579558335881} is an apocalyptic number.

51579558335881 is the 7181891-st square number.

51579558335881 is the 3590946-th centered octagonal number.

It is an amenable number.

51579558335881 is a deficient number, since it is larger than the sum of its proper divisors (7181892).

51579558335881 is an frugal number, since it uses more digits than its factorization.

51579558335881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14363782 (or 7181891 counting only the distinct ones).

The product of its digits is 907200000, while the sum is 73.

The spelling of 51579558335881 in words is "fifty-one trillion, five hundred seventy-nine billion, five hundred fifty-eight million, three hundred thirty-five thousand, eight hundred eighty-one".