85431966163 has 2 divisors, whose sum is σ = 85431966164. Its totient is φ = 85431966162.

The previous prime is 85431966127. The next prime is 85431966181. The reversal of 85431966163 is 36166913458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85431966163 - 2³³ = 76842031571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85431966163.

It is not a weakly prime, because it can be changed into another prime (85431961163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42715983081 + 42715983082.

It is an arithmetic number, because the mean of its divisors is an integer number (42715983082).

Almost surely, 2^85431966163 is an apocalyptic number.

85431966163 is a deficient number, since it is larger than the sum of its proper divisors (1).

85431966163 is an equidigital number, since it uses as much as digits as its factorization.

85431966163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 52.

The spelling of 85431966163 in words is "eighty-five billion, four hundred thirty-one million, nine hundred sixty-six thousand, one hundred sixty-three".