12645562774 has 16 divisors (see below), whose sum is σ = 20673564912. Its totient is φ = 5766094368.

The previous prime is 12645562739. The next prime is 12645562777. The reversal of 12645562774 is 47726554621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12645562777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2927769 + ... + 2932084.

It is an arithmetic number, because the mean of its divisors is an integer number (1292097807).

Almost surely, 2^12645562774 is an apocalyptic number.

12645562774 is a deficient number, since it is larger than the sum of its proper divisors (8028002138).

12645562774 is a wasteful number, since it uses less digits than its factorization.

12645562774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5859951.

The product of its digits is 2822400, while the sum is 49.

The spelling of 12645562774 in words is "twelve billion, six hundred forty-five million, five hundred sixty-two thousand, seven hundred seventy-four".