161041604 has 12 divisors (see below), whose sum is σ = 288696828. Its totient is φ = 78556800.

The previous prime is 161041589. The next prime is 161041609. The reversal of 161041604 is 406140161.

It can be written as a sum of positive squares in 2 ways, for example, as 75516100 + 85525504 = 8690^2 + 9248^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161041604.

It is not an unprimeable number, because it can be changed into a prime (161041609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490817 + ... + 491144.

It is an arithmetic number, because the mean of its divisors is an integer number (24058069).

Almost surely, 2^161041604 is an apocalyptic number.

It is an amenable number.

161041604 is a deficient number, since it is larger than the sum of its proper divisors (127655224).

161041604 is a wasteful number, since it uses less digits than its factorization.

161041604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982006 (or 982004 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 161041604 is about 12690.2168618192. The cubic root of 161041604 is about 544.0590378905.

Adding to 161041604 its reverse (406140161), we get a palindrome (567181765).

The spelling of 161041604 in words is "one hundred sixty-one million, forty-one thousand, six hundred four".