86681495917 has 2 divisors, whose sum is σ = 86681495918. Its totient is φ = 86681495916.

The previous prime is 86681495899. The next prime is 86681496007. The reversal of 86681495917 is 71959418668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84057085476 + 2624410441 = 289926^2 + 51229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86681495917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86681495317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43340747958 + 43340747959.

It is an arithmetic number, because the mean of its divisors is an integer number (43340747959).

Almost surely, 2^86681495917 is an apocalyptic number.

It is an amenable number.

86681495917 is a deficient number, since it is larger than the sum of its proper divisors (1).

86681495917 is an equidigital number, since it uses as much as digits as its factorization.

86681495917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 64.

The spelling of 86681495917 in words is "eighty-six billion, six hundred eighty-one million, four hundred ninety-five thousand, nine hundred seventeen".