161293456997 has 2 divisors, whose sum is σ = 161293456998. Its totient is φ = 161293456996.

The previous prime is 161293456981. The next prime is 161293457053. The reversal of 161293456997 is 799654392161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156852434116 + 4441022881 = 396046^2 + 66641^2 .

It is a cyclic number.

It is not a de Polignac number, because 161293456997 - 2⁴ = 161293456981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161293456957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80646728498 + 80646728499.

It is an arithmetic number, because the mean of its divisors is an integer number (80646728499).

Almost surely, 2^161293456997 is an apocalyptic number.

It is an amenable number.

161293456997 is a deficient number, since it is larger than the sum of its proper divisors (1).

161293456997 is an equidigital number, since it uses as much as digits as its factorization.

161293456997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22044960, while the sum is 62.

The spelling of 161293456997 in words is "one hundred sixty-one billion, two hundred ninety-three million, four hundred fifty-six thousand, nine hundred ninety-seven".