163641090 has 32 divisors (see below), whose sum is σ = 409815936. Its totient is φ = 41740160.

The previous prime is 163641061. The next prime is 163641097. The reversal of 163641090 is 90146361.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (163641097) 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, 117891 + ... + 119270.

It is an arithmetic number, because the mean of its divisors is an integer number (12806748).

Almost surely, 2^163641090 is an apocalyptic number.

163641090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163641090 is an abundant number, since it is smaller than the sum of its proper divisors (246174846).

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

163641090 is a wasteful number, since it uses less digits than its factorization.

163641090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237194.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 163641090 is about 12792.2277184234. The cubic root of 163641090 is about 546.9707736045.

The spelling of 163641090 in words is "one hundred sixty-three million, six hundred forty-one thousand, ninety".