170879921556523 has 2 divisors, whose sum is σ = 170879921556524. Its totient is φ = 170879921556522.

The previous prime is 170879921556473. The next prime is 170879921556529. The reversal of 170879921556523 is 325655129978071.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170879921556523 is a prime.

It is not a weakly prime, because it can be changed into another prime (170879921556529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85439960778261 + 85439960778262.

It is an arithmetic number, because the mean of its divisors is an integer number (85439960778262).

Almost surely, 2^{170879921556523} is an apocalyptic number.

170879921556523 is a deficient number, since it is larger than the sum of its proper divisors (1).

170879921556523 is an equidigital number, since it uses as much as digits as its factorization.

170879921556523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768000, while the sum is 70.

The spelling of 170879921556523 in words is "one hundred seventy trillion, eight hundred seventy-nine billion, nine hundred twenty-one million, five hundred fifty-six thousand, five hundred twenty-three".