5156357756781 has 64 divisors (see below), whose sum is σ = 8871752448000. Its totient is φ = 2584927430400.

The previous prime is 5156357756743. The next prime is 5156357756791. The reversal of 5156357756781 is 1876577536515.

It is not a de Polignac number, because 5156357756781 - 2⁶ = 5156357756717 is a prime.

It is a super-2 number, since 2×5156357756781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5156357756791) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12858886 + ... + 13253816.

It is an arithmetic number, because the mean of its divisors is an integer number (138621132000).

Almost surely, 2^{5156357756781} is an apocalyptic number.

It is an amenable number.

5156357756781 is a deficient number, since it is larger than the sum of its proper divisors (3715394691219).

5156357756781 is a wasteful number, since it uses less digits than its factorization.

5156357756781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396930.

The product of its digits is 185220000, while the sum is 66.

The spelling of 5156357756781 in words is "five trillion, one hundred fifty-six billion, three hundred fifty-seven million, seven hundred fifty-six thousand, seven hundred eighty-one".