163401804 has 18 divisors (see below), whose sum is σ = 413043540. Its totient is φ = 54467256.

The previous prime is 163401803. The next prime is 163401869. The reversal of 163401804 is 408104361.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (163401803) 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 5 ways as a sum of consecutive naturals, for example, 2269434 + ... + 2269505.

Almost surely, 2^163401804 is an apocalyptic number.

It is an amenable number.

163401804 is an abundant number, since it is smaller than the sum of its proper divisors (249641736).

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

163401804 is a wasteful number, since it uses less digits than its factorization.

163401804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538949 (or 4538944 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 163401804 is about 12782.8715083897. The cubic root of 163401804 is about 546.7040388556.

The spelling of 163401804 in words is "one hundred sixty-three million, four hundred one thousand, eight hundred four".