161233604 has 24 divisors (see below), whose sum is σ = 332871168. Its totient is φ = 66870720.

The previous prime is 161233603. The next prime is 161233609. The reversal of 161233604 is 406332161.

161233604 is a modest number, since divided by 33604 gives 1612 as remainder.

It is not an unprimeable number, because it can be changed into a prime (161233603) 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, 92009 + ... + 93744.

It is an arithmetic number, because the mean of its divisors is an integer number (13869632).

Almost surely, 2^161233604 is an apocalyptic number.

161233604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161233604 is an abundant number, since it is smaller than the sum of its proper divisors (171637564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161233604 is a wasteful number, since it uses less digits than its factorization.

161233604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185795 (or 185793 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 161233604 is about 12697.7794909189. The cubic root of 161233604 is about 544.2751680637.

Adding to 161233604 its reverse (406332161), we get a palindrome (567565765).

The spelling of 161233604 in words is "one hundred sixty-one million, two hundred thirty-three thousand, six hundred four".