85556169847 has 2 divisors, whose sum is σ = 85556169848. Its totient is φ = 85556169846.

The previous prime is 85556169817. The next prime is 85556169851. The reversal of 85556169847 is 74896165558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85556169847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85556169817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42778084923 + 42778084924.

It is an arithmetic number, because the mean of its divisors is an integer number (42778084924).

Almost surely, 2^85556169847 is an apocalyptic number.

85556169847 is a deficient number, since it is larger than the sum of its proper divisors (1).

85556169847 is an equidigital number, since it uses as much as digits as its factorization.

85556169847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576000, while the sum is 64.

The spelling of 85556169847 in words is "eighty-five billion, five hundred fifty-six million, one hundred sixty-nine thousand, eight hundred forty-seven".