86161725 has 72 divisors (see below), whose sum is σ = 172509792. Its totient is φ = 42379200.

The previous prime is 86161717. The next prime is 86161727. The reversal of 86161725 is 52716168.

86161725 is a `hidden beast` number, since 8 + 616 + 17 + 25 = 666.

It is not a de Polignac number, because 86161725 - 2³ = 86161717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86161725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86161727) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 78430 + ... + 79520.

Almost surely, 2^86161725 is an apocalyptic number.

It is an amenable number.

86161725 is an abundant number, since it is smaller than the sum of its proper divisors (86348067).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86161725 is a wasteful number, since it uses less digits than its factorization.

86161725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129 (or 1112 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 86161725 is about 9282.3340276032. The cubic root of 86161725 is about 441.6770109519.

The spelling of 86161725 in words is "eighty-six million, one hundred sixty-one thousand, seven hundred twenty-five".