161843604 has 48 divisors (see below), whose sum is σ = 430613568. Its totient is φ = 46867968.

The previous prime is 161843603. The next prime is 161843611. The reversal of 161843604 is 406348161.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161843603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27862 + ... + 33165.

It is an arithmetic number, because the mean of its divisors is an integer number (8971116).

Almost surely, 2^161843604 is an apocalyptic number.

It is an amenable number.

161843604 is an abundant number, since it is smaller than the sum of its proper divisors (268769964).

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

161843604 is a wasteful number, since it uses less digits than its factorization.

161843604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61064 (or 61062 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 161843604 is about 12721.7767627010. The cubic root of 161843604 is about 544.9606951987.

The spelling of 161843604 in words is "one hundred sixty-one million, eight hundred forty-three thousand, six hundred four".