12501499455 has 24 divisors (see below), whose sum is σ = 21825170640. Its totient is φ = 6619495680.

The previous prime is 12501499429. The next prime is 12501499501. The reversal of 12501499455 is 55499410521.

12501499455 is a `hidden beast` number, since 1 + 2 + 50 + 149 + 9 + 455 = 666.

It is not a de Polignac number, because 12501499455 - 2⁹ = 12501498943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12501499455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 993066 + ... + 1005575.

It is an arithmetic number, because the mean of its divisors is an integer number (909382110).

Almost surely, 2^12501499455 is an apocalyptic number.

12501499455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12501499455 is a deficient number, since it is larger than the sum of its proper divisors (9323671185).

12501499455 is a wasteful number, since it uses less digits than its factorization.

12501499455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998791 (or 1998788 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The spelling of 12501499455 in words is "twelve billion, five hundred one million, four hundred ninety-nine thousand, four hundred fifty-five".