12642615459 has 32 divisors (see below), whose sum is σ = 19998696960. Its totient is φ = 7874453664.

The previous prime is 12642615421. The next prime is 12642615481. The reversal of 12642615459 is 95451624621.

12642615459 is a `hidden beast` number, since 1 + 2 + 6 + 42 + 61 + 545 + 9 = 666.

It is not a de Polignac number, because 12642615459 - 2⁹ = 12642614947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12642615259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210024 + ... + 263429.

It is an arithmetic number, because the mean of its divisors is an integer number (624959280).

Almost surely, 2^12642615459 is an apocalyptic number.

12642615459 is a deficient number, since it is larger than the sum of its proper divisors (7356081501).

12642615459 is a wasteful number, since it uses less digits than its factorization.

12642615459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473528 (or 473522 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The spelling of 12642615459 in words is "twelve billion, six hundred forty-two million, six hundred fifteen thousand, four hundred fifty-nine".