12564240479 has 24 divisors (see below), whose sum is σ = 15077179440. Its totient is φ = 10431783936.

The previous prime is 12564240463. The next prime is 12564240487. The reversal of 12564240479 is 97404246521.

It is not a de Polignac number, because 12564240479 - 2⁴ = 12564240463 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 (12564240179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 396287 + ... + 426815.

It is an arithmetic number, because the mean of its divisors is an integer number (628215810).

Almost surely, 2^12564240479 is an apocalyptic number.

12564240479 is a deficient number, since it is larger than the sum of its proper divisors (2512938961).

12564240479 is a wasteful number, since it uses less digits than its factorization.

12564240479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30807 (or 30800 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 12564240479 in words is "twelve billion, five hundred sixty-four million, two hundred forty thousand, four hundred seventy-nine".