161443604 has 12 divisors (see below), whose sum is σ = 322887264. Its totient is φ = 69190104.

The previous prime is 161443591. The next prime is 161443621. The reversal of 161443604 is 406344161.

161443604 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2882894 + ... + 2882949.

It is an arithmetic number, because the mean of its divisors is an integer number (26907272).

Almost surely, 2^161443604 is an apocalyptic number.

161443604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161443604 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161443604 is a wasteful number, since it uses less digits than its factorization.

161443604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5765854 (or 5765852 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 161443604 is about 12706.0459624543. The cubic root of 161443604 is about 544.5113640667.

Adding to 161443604 its reverse (406344161), we get a palindrome (567787765).

The spelling of 161443604 in words is "one hundred sixty-one million, four hundred forty-three thousand, six hundred four".