15172057161 has 8 divisors (see below), whose sum is σ = 22477121760. Its totient is φ = 10114704756.

The previous prime is 15172057141. The next prime is 15172057183. The reversal of 15172057161 is 16175027151.

It is a happy number.

15172057161 is a `hidden beast` number, since 1 + 5 + 1 + 7 + 20 + 571 + 61 = 666.

It is not a de Polignac number, because 15172057161 - 2⁵ = 15172057129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15172057141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280963995 + ... + 280964048.

It is an arithmetic number, because the mean of its divisors is an integer number (2809640220).

Almost surely, 2^15172057161 is an apocalyptic number.

It is an amenable number.

15172057161 is a deficient number, since it is larger than the sum of its proper divisors (7305064599).

15172057161 is an equidigital number, since it uses as much as digits as its factorization.

15172057161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561928052 (or 561928046 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 36.

The spelling of 15172057161 in words is "fifteen billion, one hundred seventy-two million, fifty-seven thousand, one hundred sixty-one".