86640635513 has 2 divisors, whose sum is σ = 86640635514. Its totient is φ = 86640635512.

The previous prime is 86640635503. The next prime is 86640635537. The reversal of 86640635513 is 31553604668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79810770064 + 6829865449 = 282508^2 + 82643^2 .

It is a cyclic number.

It is not a de Polignac number, because 86640635513 - 2¹⁴ = 86640619129 is a prime.

It is not a weakly prime, because it can be changed into another prime (86640635503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43320317756 + 43320317757.

It is an arithmetic number, because the mean of its divisors is an integer number (43320317757).

Almost surely, 2^86640635513 is an apocalyptic number.

It is an amenable number.

86640635513 is a deficient number, since it is larger than the sum of its proper divisors (1).

86640635513 is an equidigital number, since it uses as much as digits as its factorization.

86640635513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 86640635513 in words is "eighty-six billion, six hundred forty million, six hundred thirty-five thousand, five hundred thirteen".