86175815993 has 2 divisors, whose sum is σ = 86175815994. Its totient is φ = 86175815992.

The previous prime is 86175815989. The next prime is 86175816017. The reversal of 86175815993 is 39951857168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84231711529 + 1944104464 = 290227^2 + 44092^2 .

It is a cyclic number.

It is not a de Polignac number, because 86175815993 - 2² = 86175815989 is a prime.

It is not a weakly prime, because it can be changed into another prime (86175815903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43087907996 + 43087907997.

It is an arithmetic number, because the mean of its divisors is an integer number (43087907997).

Almost surely, 2^86175815993 is an apocalyptic number.

It is an amenable number.

86175815993 is a deficient number, since it is larger than the sum of its proper divisors (1).

86175815993 is an equidigital number, since it uses as much as digits as its factorization.

86175815993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 62.

The spelling of 86175815993 in words is "eighty-six billion, one hundred seventy-five million, eight hundred fifteen thousand, nine hundred ninety-three".