170518086881 has 2 divisors, whose sum is σ = 170518086882. Its totient is φ = 170518086880.

The previous prime is 170518086811. The next prime is 170518086997. The reversal of 170518086881 is 188680815071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88318329856 + 82199757025 = 297184^2 + 286705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170518086881 is a prime.

It is a super-2 number, since 2×170518086881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (170518086811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85259043440 + 85259043441.

It is an arithmetic number, because the mean of its divisors is an integer number (85259043441).

Almost surely, 2^170518086881 is an apocalyptic number.

It is an amenable number.

170518086881 is a deficient number, since it is larger than the sum of its proper divisors (1).

170518086881 is an equidigital number, since it uses as much as digits as its factorization.

170518086881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 860160, while the sum is 53.

The spelling of 170518086881 in words is "one hundred seventy billion, five hundred eighteen million, eighty-six thousand, eight hundred eighty-one".