51156257323613 has 24 divisors (see below), whose sum is σ = 55425079007136. Its totient is φ = 47194720372800.

The previous prime is 51156257323603. The next prime is 51156257323631. The reversal of 51156257323613 is 31632375265115.

It is not a de Polignac number, because 51156257323613 - 2²⁰ = 51156256275037 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 (51156257323603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4273342718 + ... + 4273354688.

It is an arithmetic number, because the mean of its divisors is an integer number (2309378291964).

Almost surely, 2^{51156257323613} is an apocalyptic number.

It is an amenable number.

51156257323613 is a deficient number, since it is larger than the sum of its proper divisors (4268821683523).

51156257323613 is a wasteful number, since it uses less digits than its factorization.

51156257323613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24045 (or 24032 counting only the distinct ones).

The product of its digits is 3402000, while the sum is 50.

The spelling of 51156257323613 in words is "fifty-one trillion, one hundred fifty-six billion, two hundred fifty-seven million, three hundred twenty-three thousand, six hundred thirteen".