12987777356 has 36 divisors (see below), whose sum is σ = 23891750064. Its totient is φ = 6177045600.

The previous prime is 12987777353. The next prime is 12987777377. The reversal of 12987777356 is 65377778921.

It is not an unprimeable number, because it can be changed into a prime (12987777353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 366041 + ... + 399951.

It is an arithmetic number, because the mean of its divisors is an integer number (663659724).

Almost surely, 2^12987777356 is an apocalyptic number.

It is an amenable number.

12987777356 is a deficient number, since it is larger than the sum of its proper divisors (10903972708).

12987777356 is a wasteful number, since it uses less digits than its factorization.

12987777356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34142 (or 34117 counting only the distinct ones).

The product of its digits is 31116960, while the sum is 62.

The spelling of 12987777356 in words is "twelve billion, nine hundred eighty-seven million, seven hundred seventy-seven thousand, three hundred fifty-six".