163641044 has 48 divisors (see below), whose sum is σ = 344967168. Its totient is φ = 66404448.

The previous prime is 163641041. The next prime is 163641061. The reversal of 163641044 is 440146361.

163641044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 163640998 and 163641016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163641041) 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, 65099 + ... + 67565.

It is an arithmetic number, because the mean of its divisors is an integer number (7186816).

Almost surely, 2^163641044 is an apocalyptic number.

163641044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163641044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172483584).

163641044 is an abundant number, since it is smaller than the sum of its proper divisors (181326124).

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

163641044 is a wasteful number, since it uses less digits than its factorization.

163641044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604 (or 2602 counting only the distinct ones).

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

The square root of 163641044 is about 12792.2259204565. The cubic root of 163641044 is about 546.9707223528.

The spelling of 163641044 in words is "one hundred sixty-three million, six hundred forty-one thousand, forty-four".