15624609005 has 6 divisors (see below), whose sum is σ = 18749866218. Its totient is φ = 12499463600.

The previous prime is 15624608969. The next prime is 15624609029. The reversal of 15624609005 is 50090642651.

It can be written as a sum of positive squares in 3 ways, for example, as 9385346884 + 6239262121 = 96878^2 + 78989^2 .

It is not a de Polignac number, because 15624609005 - 2⁸ = 15624608749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15624609005.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 251555 + ... + 307455.

It is an arithmetic number, because the mean of its divisors is an integer number (3124977703).

Almost surely, 2^15624609005 is an apocalyptic number.

It is an amenable number.

15624609005 is a deficient number, since it is larger than the sum of its proper divisors (3125257213).

15624609005 is an frugal number, since it uses more digits than its factorization.

15624609005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111807 (or 55906 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 15624609005 in words is "fifteen billion, six hundred twenty-four million, six hundred nine thousand, five".