161600489 has 8 divisors (see below), whose sum is σ = 167328000. Its totient is φ = 155905200.

The previous prime is 161600471. The next prime is 161600501. The reversal of 161600489 is 984006161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161600489 - 2²⁰ = 160551913 is a prime.

It is a super-2 number, since 2×161600489² = 52229436090078242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161602489) 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, 2387 + ... + 18135.

It is an arithmetic number, because the mean of its divisors is an integer number (20916000).

Almost surely, 2^161600489 is an apocalyptic number.

It is an amenable number.

161600489 is a deficient number, since it is larger than the sum of its proper divisors (5727511).

161600489 is a wasteful number, since it uses less digits than its factorization.

161600489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16111.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 161600489 is about 12712.2180991360. The cubic root of 161600489 is about 544.6876857192.

The spelling of 161600489 in words is "one hundred sixty-one million, six hundred thousand, four hundred eighty-nine".