12904509726 has 24 divisors (see below), whose sum is σ = 28923902280. Its totient is φ = 4153175376.

The previous prime is 12904509703. The next prime is 12904509727. The reversal of 12904509726 is 62790540921.

12904509726 is a `hidden beast` number, since 1 + 2 + 90 + 450 + 97 + 26 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12904509727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12360120 + ... + 12361163.

It is an arithmetic number, because the mean of its divisors is an integer number (1205162595).

Almost surely, 2^12904509726 is an apocalyptic number.

12904509726 is an abundant number, since it is smaller than the sum of its proper divisors (16019392554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12904509726 is a wasteful number, since it uses less digits than its factorization.

12904509726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24721320 (or 24721317 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 12904509726 in words is "twelve billion, nine hundred four million, five hundred nine thousand, seven hundred twenty-six".