161104450657 has 2 divisors, whose sum is σ = 161104450658. Its totient is φ = 161104450656.

The previous prime is 161104450621. The next prime is 161104450673. The reversal of 161104450657 is 756054401161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93981486096 + 67122964561 = 306564^2 + 259081^2 .

It is a cyclic number.

It is not a de Polignac number, because 161104450657 - 2¹⁹ = 161103926369 is a prime.

It is not a weakly prime, because it can be changed into another prime (161104450957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80552225328 + 80552225329.

It is an arithmetic number, because the mean of its divisors is an integer number (80552225329).

Almost surely, 2^161104450657 is an apocalyptic number.

It is an amenable number.

161104450657 is a deficient number, since it is larger than the sum of its proper divisors (1).

161104450657 is an equidigital number, since it uses as much as digits as its factorization.

161104450657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 161104450657 in words is "one hundred sixty-one billion, one hundred four million, four hundred fifty thousand, six hundred fifty-seven".