86518161 has 6 divisors (see below), whose sum is σ = 124970690. Its totient is φ = 57678768.

The previous prime is 86518141. The next prime is 86518169. The reversal of 86518161 is 16181568.

86518161 is a `hidden beast` number, since 86 + 518 + 1 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 79548561 + 6969600 = 8919^2 + 2640^2 .

It is not a de Polignac number, because 86518161 - 2⁵ = 86518129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86518169) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4806556 + ... + 4806573.

Almost surely, 2^86518161 is an apocalyptic number.

It is an amenable number.

86518161 is a deficient number, since it is larger than the sum of its proper divisors (38452529).

86518161 is a wasteful number, since it uses less digits than its factorization.

86518161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9613135 (or 9613132 counting only the distinct ones).

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

The square root of 86518161 is about 9301.5139090365. The cubic root of 86518161 is about 442.2852199077.

The spelling of 86518161 in words is "eighty-six million, five hundred eighteen thousand, one hundred sixty-one".