86161815 has 12 divisors (see below), whose sum is σ = 149347224. Its totient is φ = 45952944.

The previous prime is 86161807. The next prime is 86161843. The reversal of 86161815 is 51816168.

It is not a de Polignac number, because 86161815 - 2³ = 86161807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86161815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 957309 + ... + 957398.

It is an arithmetic number, because the mean of its divisors is an integer number (12445602).

Almost surely, 2^86161815 is an apocalyptic number.

86161815 is a deficient number, since it is larger than the sum of its proper divisors (63185409).

86161815 is a wasteful number, since it uses less digits than its factorization.

86161815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914718 (or 1914715 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 86161815 is about 9282.3388755205. The cubic root of 86161815 is about 441.6771647360.

The spelling of 86161815 in words is "eighty-six million, one hundred sixty-one thousand, eight hundred fifteen".