161255015265329 has 2 divisors, whose sum is σ = 161255015265330. Its totient is φ = 161255015265328.

The previous prime is 161255015265259. The next prime is 161255015265347. The reversal of 161255015265329 is 923562510552161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104239709746225 + 57015305519104 = 10209785^2 + 7550848^2 .

It is an emirp because it is prime and its reverse (923562510552161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161255015265329 - 2²⁴ = 161254998488113 is a prime.

It is not a weakly prime, because it can be changed into another prime (161255015265629) 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, 80627507632664 + 80627507632665.

It is an arithmetic number, because the mean of its divisors is an integer number (80627507632665).

Almost surely, 2^{161255015265329} is an apocalyptic number.

It is an amenable number.

161255015265329 is a deficient number, since it is larger than the sum of its proper divisors (1).

161255015265329 is an equidigital number, since it uses as much as digits as its factorization.

161255015265329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 161255015265329 in words is "one hundred sixty-one trillion, two hundred fifty-five billion, fifteen million, two hundred sixty-five thousand, three hundred twenty-nine".