12987636258 has 32 divisors (see below), whose sum is σ = 26265336192. Its totient is φ = 4280976000.

The previous prime is 12987636203. The next prime is 12987636271. The reversal of 12987636258 is 85263678921.

It is a junction number, because it is equal to n+sod(n) for n = 12987636198 and 12987636207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 485718 + ... + 511758.

It is an arithmetic number, because the mean of its divisors is an integer number (820791756).

Almost surely, 2^12987636258 is an apocalyptic number.

12987636258 is an abundant number, since it is smaller than the sum of its proper divisors (13277699934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12987636258 is a wasteful number, since it uses less digits than its factorization.

12987636258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26970.

The product of its digits is 8709120, while the sum is 57.

The spelling of 12987636258 in words is "twelve billion, nine hundred eighty-seven million, six hundred thirty-six thousand, two hundred fifty-eight".