12939388551 has 16 divisors (see below), whose sum is σ = 20297080800. Its totient is φ = 8118831744.

The previous prime is 12939388541. The next prime is 12939388597. The reversal of 12939388551 is 15588393921.

12939388551 is a `hidden beast` number, since 1 + 2 + 9 + 3 + 9 + 3 + 88 + 551 = 666.

It is not a de Polignac number, because 12939388551 - 2⁹ = 12939388039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12939388541) 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, 14094736 + ... + 14095653.

It is an arithmetic number, because the mean of its divisors is an integer number (1268567550).

Almost surely, 2^12939388551 is an apocalyptic number.

12939388551 is a deficient number, since it is larger than the sum of its proper divisors (7357692249).

12939388551 is a wasteful number, since it uses less digits than its factorization.

12939388551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28190415 (or 28190409 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The spelling of 12939388551 in words is "twelve billion, nine hundred thirty-nine million, three hundred eighty-eight thousand, five hundred fifty-one".