86590336581 has 20 divisors (see below), whose sum is σ = 147829711392. Its totient is φ = 49480192008.

The previous prime is 86590336559. The next prime is 86590336583. The reversal of 86590336581 is 18563309568.

86590336581 is a `hidden beast` number, since 8 + 6 + 59 + 0 + 3 + 3 + 6 + 581 = 666.

It is not a de Polignac number, because 86590336581 - 2⁵ = 86590336549 is a prime.

It is a super-2 number, since 2×86590336581² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86590336583) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 76357755 + ... + 76358888.

Almost surely, 2^86590336581 is an apocalyptic number.

86590336581 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

86590336581 is a deficient number, since it is larger than the sum of its proper divisors (61239374811).

86590336581 is a wasteful number, since it uses less digits than its factorization.

86590336581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152716662 (or 152716653 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 86590336581 in words is "eighty-six billion, five hundred ninety million, three hundred thirty-six thousand, five hundred eighty-one".