85175092777 has 2 divisors, whose sum is σ = 85175092778. Its totient is φ = 85175092776.

The previous prime is 85175092663. The next prime is 85175092781. The reversal of 85175092777 is 77729057158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42602611216 + 42572481561 = 206404^2 + 206331^2 .

It is a cyclic number.

It is not a de Polignac number, because 85175092777 - 2²³ = 85166704169 is a prime.

It is not a weakly prime, because it can be changed into another prime (85175092577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42587546388 + 42587546389.

It is an arithmetic number, because the mean of its divisors is an integer number (42587546389).

Almost surely, 2^85175092777 is an apocalyptic number.

It is an amenable number.

85175092777 is a deficient number, since it is larger than the sum of its proper divisors (1).

85175092777 is an equidigital number, since it uses as much as digits as its factorization.

85175092777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8643600, while the sum is 58.

The spelling of 85175092777 in words is "eighty-five billion, one hundred seventy-five million, ninety-two thousand, seven hundred seventy-seven".