86155967857 has 2 divisors, whose sum is σ = 86155967858. Its totient is φ = 86155967856.

The previous prime is 86155967791. The next prime is 86155967869. The reversal of 86155967857 is 75876955168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58332393441 + 27823574416 = 241521^2 + 166804^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86155967857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86155967792 and 86155967801.

It is not a weakly prime, because it can be changed into another prime (86155967057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43077983928 + 43077983929.

It is an arithmetic number, because the mean of its divisors is an integer number (43077983929).

Almost surely, 2^86155967857 is an apocalyptic number.

It is an amenable number.

86155967857 is a deficient number, since it is larger than the sum of its proper divisors (1).

86155967857 is an equidigital number, since it uses as much as digits as its factorization.

86155967857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008000, while the sum is 67.

The spelling of 86155967857 in words is "eighty-six billion, one hundred fifty-five million, nine hundred sixty-seven thousand, eight hundred fifty-seven".