161001365597 has 2 divisors, whose sum is σ = 161001365598. Its totient is φ = 161001365596.

The previous prime is 161001365549. The next prime is 161001365611. The reversal of 161001365597 is 795563100161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105725123716 + 55276241881 = 325154^2 + 235109^2 .

It is a cyclic number.

It is not a de Polignac number, because 161001365597 - 2⁸ = 161001365341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161001365527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80500682798 + 80500682799.

It is an arithmetic number, because the mean of its divisors is an integer number (80500682799).

Almost surely, 2^161001365597 is an apocalyptic number.

It is an amenable number.

161001365597 is a deficient number, since it is larger than the sum of its proper divisors (1).

161001365597 is an equidigital number, since it uses as much as digits as its factorization.

161001365597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 44.

The spelling of 161001365597 in words is "one hundred sixty-one billion, one million, three hundred sixty-five thousand, five hundred ninety-seven".