85556170811 has 2 divisors, whose sum is σ = 85556170812. Its totient is φ = 85556170810.

The previous prime is 85556170801. The next prime is 85556170877. The reversal of 85556170811 is 11807165558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85556170811 - 2¹⁸ = 85555908667 is a prime.

It is not a weakly prime, because it can be changed into another prime (85556170801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42778085405 + 42778085406.

It is an arithmetic number, because the mean of its divisors is an integer number (42778085406).

Almost surely, 2^85556170811 is an apocalyptic number.

85556170811 is a deficient number, since it is larger than the sum of its proper divisors (1).

85556170811 is an equidigital number, since it uses as much as digits as its factorization.

85556170811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336000, while the sum is 47.

The spelling of 85556170811 in words is "eighty-five billion, five hundred fifty-six million, one hundred seventy thousand, eight hundred eleven".