86636557 has 12 divisors (see below), whose sum is σ = 102928320. Its totient is φ = 72677976.

The previous prime is 86636551. The next prime is 86636581. The reversal of 86636557 is 75563668.

It is a happy number.

It is not a de Polignac number, because 86636557 - 2¹⁵ = 86603789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86636551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16507 + ... + 21112.

It is an arithmetic number, because the mean of its divisors is an integer number (8577360).

Almost surely, 2^86636557 is an apocalyptic number.

It is an amenable number.

86636557 is a deficient number, since it is larger than the sum of its proper divisors (16291763).

86636557 is a wasteful number, since it uses less digits than its factorization.

86636557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37680 (or 37673 counting only the distinct ones).

The product of its digits is 907200, while the sum is 46.

The square root of 86636557 is about 9307.8760735197. The cubic root of 86636557 is about 442.4868767321.

The spelling of 86636557 in words is "eighty-six million, six hundred thirty-six thousand, five hundred fifty-seven".