12499774645 has 32 divisors (see below), whose sum is σ = 15329865600. Its totient is φ = 9782918400.

The previous prime is 12499774631. The next prime is 12499774669. The reversal of 12499774645 is 54647799421.

It is not a de Polignac number, because 12499774645 - 2⁷ = 12499774517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12499774645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21294042 + ... + 21294628.

It is an arithmetic number, because the mean of its divisors is an integer number (479058300).

Almost surely, 2^12499774645 is an apocalyptic number.

It is an amenable number.

12499774645 is a deficient number, since it is larger than the sum of its proper divisors (2830090955).

12499774645 is a wasteful number, since it uses less digits than its factorization.

12499774645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125.

The product of its digits is 15240960, while the sum is 58.

The spelling of 12499774645 in words is "twelve billion, four hundred ninety-nine million, seven hundred seventy-four thousand, six hundred forty-five".