170763385921 has 2 divisors, whose sum is σ = 170763385922. Its totient is φ = 170763385920.

The previous prime is 170763385831. The next prime is 170763385937. The reversal of 170763385921 is 129583367071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151582520896 + 19180865025 = 389336^2 + 138495^2 .

It is a cyclic number.

It is not a de Polignac number, because 170763385921 - 2⁹ = 170763385409 is a prime.

It is not a weakly prime, because it can be changed into another prime (170763385981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85381692960 + 85381692961.

It is an arithmetic number, because the mean of its divisors is an integer number (85381692961).

Almost surely, 2^170763385921 is an apocalyptic number.

It is an amenable number.

170763385921 is a deficient number, since it is larger than the sum of its proper divisors (1).

170763385921 is an equidigital number, since it uses as much as digits as its factorization.

170763385921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 170763385921 in words is "one hundred seventy billion, seven hundred sixty-three million, three hundred eighty-five thousand, nine hundred twenty-one".