12776776831 has 32 divisors (see below), whose sum is σ = 15905297408. Its totient is φ = 9993715200.

The previous prime is 12776776829. The next prime is 12776776843. The reversal of 12776776831 is 13867767721.

It is not a de Polignac number, because 12776776831 - 2¹ = 12776776829 is a prime.

It is a super-2 number, since 2×12776776831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12776776861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9850375 + ... + 9851671.

It is an arithmetic number, because the mean of its divisors is an integer number (497040544).

Almost surely, 2^12776776831 is an apocalyptic number.

12776776831 is a deficient number, since it is larger than the sum of its proper divisors (3128520577).

12776776831 is a wasteful number, since it uses less digits than its factorization.

12776776831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471.

The product of its digits is 4148928, while the sum is 55.

The spelling of 12776776831 in words is "twelve billion, seven hundred seventy-six million, seven hundred seventy-six thousand, eight hundred thirty-one".