161600530883381 has 2 divisors, whose sum is σ = 161600530883382. Its totient is φ = 161600530883380.

The previous prime is 161600530883377. The next prime is 161600530883401. The reversal of 161600530883381 is 183388035006161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151165402064356 + 10435128819025 = 12294934^2 + 3230345^2 .

It is a cyclic number.

It is not a de Polignac number, because 161600530883381 - 2² = 161600530883377 is a prime.

It is a super-2 number, since 2×161600530883381² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161600530883321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80800265441690 + 80800265441691.

It is an arithmetic number, because the mean of its divisors is an integer number (80800265441691).

Almost surely, 2^{161600530883381} is an apocalyptic number.

It is an amenable number.

161600530883381 is a deficient number, since it is larger than the sum of its proper divisors (1).

161600530883381 is an equidigital number, since it uses as much as digits as its factorization.

161600530883381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 161600530883381 in words is "one hundred sixty-one trillion, six hundred billion, five hundred thirty million, eight hundred eighty-three thousand, three hundred eighty-one".