165923475198473 has 2 divisors, whose sum is σ = 165923475198474. Its totient is φ = 165923475198472.

The previous prime is 165923475198457. The next prime is 165923475198479. The reversal of 165923475198473 is 374891574329561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134019820816249 + 31903654382224 = 11576693^2 + 5648332^2 .

It is a cyclic number.

It is not a de Polignac number, because 165923475198473 - 2⁴ = 165923475198457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165923475198473.

It is not a weakly prime, because it can be changed into another prime (165923475198479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82961737599236 + 82961737599237.

It is an arithmetic number, because the mean of its divisors is an integer number (82961737599237).

Almost surely, 2^{165923475198473} is an apocalyptic number.

It is an amenable number.

165923475198473 is a deficient number, since it is larger than the sum of its proper divisors (1).

165923475198473 is an equidigital number, since it uses as much as digits as its factorization.

165923475198473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1371686400, while the sum is 74.

The spelling of 165923475198473 in words is "one hundred sixty-five trillion, nine hundred twenty-three billion, four hundred seventy-five million, one hundred ninety-eight thousand, four hundred seventy-three".