86115260981 has 2 divisors, whose sum is σ = 86115260982. Its totient is φ = 86115260980.

The previous prime is 86115260977. The next prime is 86115260993. The reversal of 86115260981 is 18906251168.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51241565956 + 34873695025 = 226366^2 + 186745^2 .

It is a cyclic number.

It is not a de Polignac number, because 86115260981 - 2² = 86115260977 is a prime.

It is a super-2 number, since 2×86115260981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86115260921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43057630490 + 43057630491.

It is an arithmetic number, because the mean of its divisors is an integer number (43057630491).

Almost surely, 2^86115260981 is an apocalyptic number.

It is an amenable number.

86115260981 is a deficient number, since it is larger than the sum of its proper divisors (1).

86115260981 is an equidigital number, since it uses as much as digits as its factorization.

86115260981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 86115260981 in words is "eighty-six billion, one hundred fifteen million, two hundred sixty thousand, nine hundred eighty-one".