15117745049 has 32 divisors (see below), whose sum is σ = 17662095360. Its totient is φ = 12801078400.

The previous prime is 15117745039. The next prime is 15117745051. The reversal of 15117745049 is 94054771151.

It is not a de Polignac number, because 15117745049 - 2⁴ = 15117745033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15117745039) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7457174 + ... + 7459200.

It is an arithmetic number, because the mean of its divisors is an integer number (551940480).

Almost surely, 2^15117745049 is an apocalyptic number.

It is an amenable number.

15117745049 is a deficient number, since it is larger than the sum of its proper divisors (2544350311).

15117745049 is a wasteful number, since it uses less digits than its factorization.

15117745049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821.

The product of its (nonzero) digits is 176400, while the sum is 44.

The spelling of 15117745049 in words is "fifteen billion, one hundred seventeen million, seven hundred forty-five thousand, forty-nine".