15120161155161 has 24 divisors (see below), whose sum is σ = 21849466995720. Its totient is φ = 10075846361856.

The previous prime is 15120161155159. The next prime is 15120161155181. The reversal of 15120161155161 is 16155116102151.

15120161155161 is a `hidden beast` number, since 1 + 5 + 1 + 20 + 1 + 6 + 115 + 516 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3757565141136 + 11362596014025 = 1938444^2 + 3370845^2 .

It is not a de Polignac number, because 15120161155161 - 2¹ = 15120161155159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15120161155111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 245949535 + ... + 246011003.

It is an arithmetic number, because the mean of its divisors is an integer number (910394458155).

Almost surely, 2^{15120161155161} is an apocalyptic number.

It is an amenable number.

15120161155161 is a deficient number, since it is larger than the sum of its proper divisors (6729305840559).

15120161155161 is a wasteful number, since it uses less digits than its factorization.

15120161155161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72585 (or 72582 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 36.

The spelling of 15120161155161 in words is "fifteen trillion, one hundred twenty billion, one hundred sixty-one million, one hundred fifty-five thousand, one hundred sixty-one".