12776928687 has 16 divisors (see below), whose sum is σ = 19390462560. Its totient is φ = 8310196800.

The previous prime is 12776928677. The next prime is 12776928691. The reversal of 12776928687 is 78682967721.

12776928687 is a `hidden beast` number, since 1 + 277 + 6 + 9 + 286 + 87 = 666.

It is not a de Polignac number, because 12776928687 - 2¹² = 12776924591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12776928677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5769864 + ... + 5772077.

It is an arithmetic number, because the mean of its divisors is an integer number (1211903910).

Almost surely, 2^12776928687 is an apocalyptic number.

12776928687 is a deficient number, since it is larger than the sum of its proper divisors (6613533873).

12776928687 is a wasteful number, since it uses less digits than its factorization.

12776928687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11541991 (or 11541985 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 63.

The spelling of 12776928687 in words is "twelve billion, seven hundred seventy-six million, nine hundred twenty-eight thousand, six hundred eighty-seven".