15499970312 has 12 divisors (see below), whose sum is σ = 29063104605. Its totient is φ = 7749809088.

The previous prime is 15499970263. The next prime is 15499970357. The reversal of 15499970312 is 21307999451.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 14021875396 + 1478094916 = 118414^2 + 38446^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=88034.

It is a Duffinian 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 2 ways as a sum of consecutive naturals, for example, 330128 + ... + 374144.

Almost surely, 2^15499970312 is an apocalyptic number.

It is an amenable number.

15499970312 is a deficient number, since it is larger than the sum of its proper divisors (13563134293).

15499970312 is an frugal number, since it uses more digits than its factorization.

15499970312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88040 (or 44019 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 50.

Multiplying 15499970312 by its sum of digits (50), we get a square (774998515600 = 880340²).

The spelling of 15499970312 in words is "fifteen billion, four hundred ninety-nine million, nine hundred seventy thousand, three hundred twelve".