170064320981 has 2 divisors, whose sum is σ = 170064320982. Its totient is φ = 170064320980.

The previous prime is 170064320977. The next prime is 170064321107. The reversal of 170064320981 is 189023460071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98868740356 + 71195580625 = 314434^2 + 266825^2 .

It is a cyclic number.

It is not a de Polignac number, because 170064320981 - 2² = 170064320977 is a prime.

It is a super-2 number, since 2×170064320981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170064310981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85032160490 + 85032160491.

It is an arithmetic number, because the mean of its divisors is an integer number (85032160491).

Almost surely, 2^170064320981 is an apocalyptic number.

It is an amenable number.

170064320981 is a deficient number, since it is larger than the sum of its proper divisors (1).

170064320981 is an equidigital number, since it uses as much as digits as its factorization.

170064320981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 170064320981 in words is "one hundred seventy billion, sixty-four million, three hundred twenty thousand, nine hundred eighty-one".