15120725949 has 20 divisors (see below), whose sum is σ = 25814573664. Its totient is φ = 8640414504.

The previous prime is 15120725929. The next prime is 15120725957. The reversal of 15120725949 is 94952702151.

15120725949 is a `hidden beast` number, since 1 + 51 + 2 + 0 + 7 + 2 + 594 + 9 = 666.

It is not a de Polignac number, because 15120725949 - 2¹⁹ = 15120201661 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15120725909) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13333407 + ... + 13334540.

Almost surely, 2^15120725949 is an apocalyptic number.

It is an amenable number.

15120725949 is a deficient number, since it is larger than the sum of its proper divisors (10693847715).

15120725949 is an equidigital number, since it uses as much as digits as its factorization.

15120725949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26667966 (or 26667957 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The spelling of 15120725949 in words is "fifteen billion, one hundred twenty million, seven hundred twenty-five thousand, nine hundred forty-nine".