85556170877 has 2 divisors, whose sum is σ = 85556170878. Its totient is φ = 85556170876.

The previous prime is 85556170811. The next prime is 85556170927. The reversal of 85556170877 is 77807165558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43879356676 + 41676814201 = 209474^2 + 204149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85556170877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85556176877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42778085438 + 42778085439.

It is an arithmetic number, because the mean of its divisors is an integer number (42778085439).

Almost surely, 2^85556170877 is an apocalyptic number.

It is an amenable number.

85556170877 is a deficient number, since it is larger than the sum of its proper divisors (1).

85556170877 is an equidigital number, since it uses as much as digits as its factorization.

85556170877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16464000, while the sum is 59.

The spelling of 85556170877 in words is "eighty-five billion, five hundred fifty-six million, one hundred seventy thousand, eight hundred seventy-seven".