161493566244 has 24 divisors (see below), whose sum is σ = 376835591328. Its totient is φ = 53828721600.

The previous prime is 161493566219. The next prime is 161493566257. The reversal of 161493566244 is 442665394161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25257 + ... + 568880.

It is an arithmetic number, because the mean of its divisors is an integer number (15701482972).

Almost surely, 2^161493566244 is an apocalyptic number.

It is an amenable number.

161493566244 is an abundant number, since it is smaller than the sum of its proper divisors (215342025084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161493566244 is a wasteful number, since it uses less digits than its factorization.

161493566244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616795 (or 616793 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The spelling of 161493566244 in words is "one hundred sixty-one billion, four hundred ninety-three million, five hundred sixty-six thousand, two hundred forty-four".