170879921556473 has 2 divisors, whose sum is σ = 170879921556474. Its totient is φ = 170879921556472.

The previous prime is 170879921556413. The next prime is 170879921556523. The reversal of 170879921556473 is 374655129978071.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164764128258304 + 6115793298169 = 12836048^2 + 2473013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170879921556473 is a prime.

It is a super-2 number, since 2×170879921556473² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 170879921556473.

It is not a weakly prime, because it can be changed into another prime (170879921556413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85439960778236 + 85439960778237.

It is an arithmetic number, because the mean of its divisors is an integer number (85439960778237).

It is a 1-persistent number, because it is pandigital, but 2⋅170879921556473 = 341759843112946 is not.

Almost surely, 2^{170879921556473} is an apocalyptic number.

It is an amenable number.

170879921556473 is a deficient number, since it is larger than the sum of its proper divisors (1).

170879921556473 is an equidigital number, since it uses as much as digits as its factorization.

170879921556473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800150400, while the sum is 74.

The spelling of 170879921556473 in words is "one hundred seventy trillion, eight hundred seventy-nine billion, nine hundred twenty-one million, five hundred fifty-six thousand, four hundred seventy-three".