161041869 has 24 divisors (see below), whose sum is σ = 243439872. Its totient is φ = 102461760.

The previous prime is 161041861. The next prime is 161041873. The reversal of 161041869 is 968140161.

It is a happy number.

It is not a de Polignac number, because 161041869 - 2³ = 161041861 is a prime.

It is a super-2 number, since 2×161041869² = 51868967142026322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161041861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16414 + ... + 24320.

It is an arithmetic number, because the mean of its divisors is an integer number (10143328).

Almost surely, 2^161041869 is an apocalyptic number.

It is an amenable number.

161041869 is a deficient number, since it is larger than the sum of its proper divisors (82398003).

161041869 is a wasteful number, since it uses less digits than its factorization.

161041869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8017 (or 8014 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 161041869 is about 12690.2273029288. The cubic root of 161041869 is about 544.0593363135.

The spelling of 161041869 in words is "one hundred sixty-one million, forty-one thousand, eight hundred sixty-nine".