86641564 has 12 divisors (see below), whose sum is σ = 153186544. Its totient is φ = 42873984.

The previous prime is 86641561. The next prime is 86641601. The reversal of 86641564 is 46514668.

It is a happy number.

It is a super-2 number, since 2×86641564² = 15013521224732192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86641561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111264 + ... + 112039.

Almost surely, 2^86641564 is an apocalyptic number.

It is an amenable number.

86641564 is a deficient number, since it is larger than the sum of its proper divisors (66544980).

86641564 is a wasteful number, since it uses less digits than its factorization.

86641564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223404 (or 223402 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 86641564 is about 9308.1450353978. The cubic root of 86641564 is about 442.4954008055.

The spelling of 86641564 in words is "eighty-six million, six hundred forty-one thousand, five hundred sixty-four".