15624981425 has 12 divisors (see below), whose sum is σ = 19620232320. Its totient is φ = 12341755920.

The previous prime is 15624981419. The next prime is 15624981433. The reversal of 15624981425 is 52418942651.

15624981425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15624981425 - 2²² = 15620787121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15624981425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3953717 + ... + 3957666.

It is an arithmetic number, because the mean of its divisors is an integer number (1635019360).

Almost surely, 2^15624981425 is an apocalyptic number.

It is an amenable number.

15624981425 is a deficient number, since it is larger than the sum of its proper divisors (3995250895).

15624981425 is an equidigital number, since it uses as much as digits as its factorization.

15624981425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7911472 (or 7911467 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The spelling of 15624981425 in words is "fifteen billion, six hundred twenty-four million, nine hundred eighty-one thousand, four hundred twenty-five".