12887139551 has 16 divisors (see below), whose sum is σ = 15175174560. Its totient is φ = 10789355520.

The previous prime is 12887139523. The next prime is 12887139619. The reversal of 12887139551 is 15593178821.

It is a cyclic number.

It is not a de Polignac number, because 12887139551 - 2³⁰ = 11813397727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12887139551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12887139511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42146 + ... + 165983.

It is an arithmetic number, because the mean of its divisors is an integer number (948448410).

Almost surely, 2^12887139551 is an apocalyptic number.

12887139551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12887139551 is a deficient number, since it is larger than the sum of its proper divisors (2288035009).

12887139551 is a wasteful number, since it uses less digits than its factorization.

12887139551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208586.

The product of its digits is 604800, while the sum is 50.

The spelling of 12887139551 in words is "twelve billion, eight hundred eighty-seven million, one hundred thirty-nine thousand, five hundred fifty-one".