165616160497 has 2 divisors, whose sum is σ = 165616160498. Its totient is φ = 165616160496.

The previous prime is 165616160477. The next prime is 165616160527. The reversal of 165616160497 is 794061616561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131717459041 + 33898701456 = 362929^2 + 184116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165616160497 is a prime.

It is not a weakly prime, because it can be changed into another prime (165616160477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82808080248 + 82808080249.

It is an arithmetic number, because the mean of its divisors is an integer number (82808080249).

Almost surely, 2^165616160497 is an apocalyptic number.

It is an amenable number.

165616160497 is a deficient number, since it is larger than the sum of its proper divisors (1).

165616160497 is an equidigital number, since it uses as much as digits as its factorization.

165616160497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 165616160497 in words is "one hundred sixty-five billion, six hundred sixteen million, one hundred sixty thousand, four hundred ninety-seven".