161829118097 has 2 divisors, whose sum is σ = 161829118098. Its totient is φ = 161829118096.

The previous prime is 161829118081. The next prime is 161829118117. The reversal of 161829118097 is 790811928161.

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., 161532451921 + 296666176 = 401911^2 + 17224^2 .

It is an emirp because it is prime and its reverse (790811928161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161829118097 - 2⁴ = 161829118081 is a prime.

It is not a weakly prime, because it can be changed into another prime (161829118397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80914559048 + 80914559049.

It is an arithmetic number, because the mean of its divisors is an integer number (80914559049).

Almost surely, 2^161829118097 is an apocalyptic number.

It is an amenable number.

161829118097 is a deficient number, since it is larger than the sum of its proper divisors (1).

161829118097 is an equidigital number, since it uses as much as digits as its factorization.

161829118097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 53.

The spelling of 161829118097 in words is "one hundred sixty-one billion, eight hundred twenty-nine million, one hundred eighteen thousand, ninety-seven".