15613316974161 has 21 divisors (see below), whose sum is σ = 23409426697401. Its totient is φ = 10408806858132.

The previous prime is 15613316974159. The next prime is 15613316974163. The reversal of 15613316974161 is 16147961331651.

It is a happy number.

The square root of 15613316974161 is 3951369.

It is a perfect power (a square), and thus also a powerful number.

15613316974161 is a `hidden beast` number, since 1 + 5 + 6 + 133 + 1 + 6 + 97 + 416 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (15613316974159) and next prime (15613316974163).

It is not a de Polignac number, because 15613316974161 - 2¹ = 15613316974159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15613316974098 and 15613316974107.

It is not an unprimeable number, because it can be changed into a prime (15613316974163) by changing a digit.

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 20 ways as a sum of consecutive naturals, for example, 106613790 + ... + 106760136.

Almost surely, 2^{15613316974161} is an apocalyptic number.

15613316974161 is the 3951369-th square number.

15613316974161 is the 1975685-th centered octagonal number.

It is an amenable number.

15613316974161 is a deficient number, since it is larger than the sum of its proper divisors (7796109723240).

15613316974161 is an frugal number, since it uses more digits than its factorization.

15613316974161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292712 (or 146350 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The spelling of 15613316974161 in words is "fifteen trillion, six hundred thirteen billion, three hundred sixteen million, nine hundred seventy-four thousand, one hundred sixty-one".