161033645 has 8 divisors (see below), whose sum is σ = 203411040. Its totient is φ = 122046480.

The previous prime is 161033641. The next prime is 161033647. The reversal of 161033645 is 546330161.

It is a happy number.

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

It is not a de Polignac number, because 161033645 - 2² = 161033641 is a prime.

It is a super-3 number, since 3×161033645³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161033641) 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, 847451 + ... + 847640.

It is an arithmetic number, because the mean of its divisors is an integer number (25426380).

Almost surely, 2^161033645 is an apocalyptic number.

It is an amenable number.

161033645 is a deficient number, since it is larger than the sum of its proper divisors (42377395).

161033645 is a wasteful number, since it uses less digits than its factorization.

161033645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695115.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 161033645 is about 12689.9032699229. The cubic root of 161033645 is about 544.0500749122.

The spelling of 161033645 in words is "one hundred sixty-one million, thirty-three thousand, six hundred forty-five".