12986868658 has 16 divisors (see below), whose sum is σ = 19681394904. Its totient is φ = 6426457600.

The previous prime is 12986868641. The next prime is 12986868679. The reversal of 12986868658 is 85686868921.

It can be written as a sum of positive squares in 4 ways, for example, as 12646576849 + 340291809 = 112457^2 + 18447^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12986868593 and 12986868602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524616 + ... + 548812.

Almost surely, 2^12986868658 is an apocalyptic number.

12986868658 is a deficient number, since it is larger than the sum of its proper divisors (6694526246).

12986868658 is a wasteful number, since it uses less digits than its factorization.

12986868658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26957.

The product of its digits is 79626240, while the sum is 67.

The spelling of 12986868658 in words is "twelve billion, nine hundred eighty-six million, eight hundred sixty-eight thousand, six hundred fifty-eight".