12568494677 has 4 divisors (see below), whose sum is σ = 12805636140. Its totient is φ = 12331353216.

The previous prime is 12568494619. The next prime is 12568494683. The reversal of 12568494677 is 77649486521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77649486521 = 2621 ⋅29625901.

It can be written as a sum of positive squares in 2 ways, for example, as 5697079441 + 6871415236 = 75479^2 + 82894^2 .

It is a cyclic number.

It is not a de Polignac number, because 12568494677 - 2¹⁰ = 12568493653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12568494377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118570652 + ... + 118570757.

It is an arithmetic number, because the mean of its divisors is an integer number (3201409035).

Almost surely, 2^12568494677 is an apocalyptic number.

It is an amenable number.

12568494677 is a deficient number, since it is larger than the sum of its proper divisors (237141463).

12568494677 is an equidigital number, since it uses as much as digits as its factorization.

12568494677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237141462.

The product of its digits is 20321280, while the sum is 59.

The spelling of 12568494677 in words is "twelve billion, five hundred sixty-eight million, four hundred ninety-four thousand, six hundred seventy-seven".