161913488 has 40 divisors (see below), whose sum is σ = 345099936. Its totient is φ = 73587360.

The previous prime is 161913487. The next prime is 161913503. The reversal of 161913488 is 884319161.

161913488 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161913488² = 52431955192652288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161913481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17495 + ... + 25097.

Almost surely, 2^161913488 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 161913488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172549968).

161913488 is an abundant number, since it is smaller than the sum of its proper divisors (183186448).

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

161913488 is an equidigital number, since it uses as much as digits as its factorization.

161913488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7644 (or 7616 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 161913488 is about 12724.5230951891. The cubic root of 161913488 is about 545.0391218444.

The spelling of 161913488 in words is "one hundred sixty-one million, nine hundred thirteen thousand, four hundred eighty-eight".