161596944 has 120 divisors (see below), whose sum is σ = 475282080. Its totient is φ = 53146368.

The previous prime is 161596943. The next prime is 161596973. The reversal of 161596944 is 449695161.

It is a happy number.

161596944 is a `hidden beast` number, since 16 + 1 + 596 + 9 + 44 = 666.

It is a super-2 number, since 2×161596944² = 52227144620278272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161596944.

It is not an unprimeable number, because it can be changed into a prime (161596943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 345799 + ... + 346265.

It is an arithmetic number, because the mean of its divisors is an integer number (3960684).

Almost surely, 2^161596944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161596944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237641040).

161596944 is an abundant number, since it is smaller than the sum of its proper divisors (313685136).

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

161596944 is an equidigital number, since it uses as much as digits as its factorization.

161596944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 561 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 161596944 is about 12712.0786655842. The cubic root of 161596944 is about 544.6837027858.

The spelling of 161596944 in words is "one hundred sixty-one million, five hundred ninety-six thousand, nine hundred forty-four".