86364562581 has 16 divisors (see below), whose sum is σ = 139579091520. Its totient is φ = 52342158960.

The previous prime is 86364562573. The next prime is 86364562589. The reversal of 86364562581 is 18526546368.

86364562581 is a `hidden beast` number, since 8 + 6 + 3 + 6 + 4 + 5 + 625 + 8 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (86364562573) and next prime (86364562589).

It is not a de Polignac number, because 86364562581 - 2³ = 86364562573 is a prime.

It is a super-2 number, since 2×86364562581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86364562589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145394590 + ... + 145395183.

It is an arithmetic number, because the mean of its divisors is an integer number (8723693220).

Almost surely, 2^86364562581 is an apocalyptic number.

It is an amenable number.

86364562581 is a deficient number, since it is larger than the sum of its proper divisors (53214528939).

86364562581 is a wasteful number, since it uses less digits than its factorization.

86364562581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290789793 (or 290789787 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The spelling of 86364562581 in words is "eighty-six billion, three hundred sixty-four million, five hundred sixty-two thousand, five hundred eighty-one".