161693246317 has 2 divisors, whose sum is σ = 161693246318. Its totient is φ = 161693246316.

The previous prime is 161693246311. The next prime is 161693246369. The reversal of 161693246317 is 713642396161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138692187396 + 23001058921 = 372414^2 + 151661^2 .

It is a cyclic number.

It is not a de Polignac number, because 161693246317 - 2³⁵ = 127333507949 is a prime.

It is a super-2 number, since 2×161693246317² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161693246311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80846623158 + 80846623159.

It is an arithmetic number, because the mean of its divisors is an integer number (80846623159).

Almost surely, 2^161693246317 is an apocalyptic number.

It is an amenable number.

161693246317 is a deficient number, since it is larger than the sum of its proper divisors (1).

161693246317 is an equidigital number, since it uses as much as digits as its factorization.

161693246317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 49.

The spelling of 161693246317 in words is "one hundred sixty-one billion, six hundred ninety-three million, two hundred forty-six thousand, three hundred seventeen".