161608449 has 8 divisors (see below), whose sum is σ = 215557920. Its totient is φ = 107698976.

The previous prime is 161608399. The next prime is 161608463. The reversal of 161608449 is 944806161.

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

It is a cyclic number.

It is not a de Polignac number, because 161608449 - 2¹⁵ = 161575681 is a prime.

It is a super-2 number, since 2×161608449² = 52234581576371202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161608949) 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, 1234 + ... + 18020.

It is an arithmetic number, because the mean of its divisors is an integer number (26944740).

Almost surely, 2^161608449 is an apocalyptic number.

It is an amenable number.

161608449 is a deficient number, since it is larger than the sum of its proper divisors (53949471).

161608449 is a wasteful number, since it uses less digits than its factorization.

161608449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19999.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 161608449 is about 12712.5311799028. The cubic root of 161608449 is about 544.6966288497.

The spelling of 161608449 in words is "one hundred sixty-one million, six hundred eight thousand, four hundred forty-nine".