12594978512 has 40 divisors (see below), whose sum is σ = 25007209704. Its totient is φ = 6142882304.

The previous prime is 12594978509. The next prime is 12594978521. The reversal of 12594978512 is 21587949521.

It can be written as a sum of positive squares in 4 ways, for example, as 10331502736 + 2263475776 = 101644^2 + 47576^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

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, 103778 + ... + 189630.

Almost surely, 2^12594978512 is an apocalyptic number.

It is an amenable number.

12594978512 is a deficient number, since it is larger than the sum of its proper divisors (12412231192).

12594978512 is a wasteful number, since it uses less digits than its factorization.

12594978512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86087 (or 86081 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 53.

The spelling of 12594978512 in words is "twelve billion, five hundred ninety-four million, nine hundred seventy-eight thousand, five hundred twelve".