15918386161 has 32 divisors (see below), whose sum is σ = 17359372800. Its totient is φ = 14567454720.

The previous prime is 15918386153. The next prime is 15918386167. The reversal of 15918386161 is 16168381951.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 15918386161 - 2³ = 15918386153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15918386167) 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, 5151705 + ... + 5154793.

It is an arithmetic number, because the mean of its divisors is an integer number (542480400).

Almost surely, 2^15918386161 is an apocalyptic number.

It is an amenable number.

15918386161 is a deficient number, since it is larger than the sum of its proper divisors (1440986639).

15918386161 is a wasteful number, since it uses less digits than its factorization.

15918386161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3289.

The product of its digits is 311040, while the sum is 49.

The spelling of 15918386161 in words is "fifteen billion, nine hundred eighteen million, three hundred eighty-six thousand, one hundred sixty-one".