161600449 has 8 divisors (see below), whose sum is σ = 164239040. Its totient is φ = 158968656.

The previous prime is 161600447. The next prime is 161600471. The reversal of 161600449 is 944006161.

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 161600449 - 2¹ = 161600447 is a prime.

It is a super-2 number, since 2×161600449² = 52229410234003202, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161600449.

It is not an unprimeable number, because it can be changed into a prime (161600447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70087 + ... + 72355.

It is an arithmetic number, because the mean of its divisors is an integer number (20529880).

Almost surely, 2^161600449 is an apocalyptic number.

It is an amenable number.

161600449 is a deficient number, since it is larger than the sum of its proper divisors (2638591).

161600449 is a wasteful number, since it uses less digits than its factorization.

161600449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 161600449 is about 12712.2165258463. The cubic root of 161600449 is about 544.6876407781.

The spelling of 161600449 in words is "one hundred sixty-one million, six hundred thousand, four hundred forty-nine".