161448394849 has 12 divisors (see below), whose sum is σ = 187860675924. Its totient is φ = 138345021024.

The previous prime is 161448394829. The next prime is 161448394873. The reversal of 161448394849 is 948493844161.

It can be written as a sum of positive squares in 2 ways, for example, as 73295815824 + 88152579025 = 270732^2 + 296905^2 .

It is not a de Polignac number, because 161448394849 - 2⁷ = 161448394721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161448394829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293182 + ... + 639415.

It is an arithmetic number, because the mean of its divisors is an integer number (15655056327).

Almost surely, 2^161448394849 is an apocalyptic number.

It is an amenable number.

161448394849 is a deficient number, since it is larger than the sum of its proper divisors (26412281075).

161448394849 is an equidigital number, since it uses as much as digits as its factorization.

161448394849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936144 (or 936137 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 61.

The spelling of 161448394849 in words is "one hundred sixty-one billion, four hundred forty-eight million, three hundred ninety-four thousand, eight hundred forty-nine".