51158811887613 has 6 divisors (see below), whose sum is σ = 73896061615454. Its totient is φ = 34105874591736.

The previous prime is 51158811887593. The next prime is 51158811887627. The reversal of 51158811887613 is 31678811885115.

51158811887613 is a `hidden beast` number, since 5 + 1 + 1 + 5 + 8 + 8 + 1 + 1 + 8 + 8 + 7 + 613 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38003008256964 + 13155803630649 = 6164658^2 + 3627093^2 .

It is not a de Polignac number, because 51158811887613 - 2⁵ = 51158811887581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51158811886613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2842156215970 + ... + 2842156215987.

Almost surely, 2^{51158811887613} is an apocalyptic number.

It is an amenable number.

51158811887613 is a deficient number, since it is larger than the sum of its proper divisors (22737249727841).

51158811887613 is a wasteful number, since it uses less digits than its factorization.

51158811887613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5684312431963 (or 5684312431960 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 63.

The spelling of 51158811887613 in words is "fifty-one trillion, one hundred fifty-eight billion, eight hundred eleven million, eight hundred eighty-seven thousand, six hundred thirteen".