161041750690213 has 2 divisors, whose sum is σ = 161041750690214. Its totient is φ = 161041750690212.

The previous prime is 161041750690181. The next prime is 161041750690231. The reversal of 161041750690213 is 312096057140161.

Together with next prime (161041750690231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123404593172644 + 37637157517569 = 11108762^2 + 6134913^2 .

It is a cyclic number.

It is not a de Polignac number, because 161041750690213 - 2⁵ = 161041750690181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161041750690243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80520875345106 + 80520875345107.

It is an arithmetic number, because the mean of its divisors is an integer number (80520875345107).

Almost surely, 2^{161041750690213} is an apocalyptic number.

It is an amenable number.

161041750690213 is a deficient number, since it is larger than the sum of its proper divisors (1).

161041750690213 is an equidigital number, since it uses as much as digits as its factorization.

161041750690213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 161041750690213 in words is "one hundred sixty-one trillion, forty-one billion, seven hundred fifty million, six hundred ninety thousand, two hundred thirteen".