163646442 has 24 divisors (see below), whose sum is σ = 357885216. Its totient is φ = 54038376.

The previous prime is 163646429. The next prime is 163646447. The reversal of 163646442 is 244646361.

163646442 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 4 + 644 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 163646397 and 163646406.

It is not an unprimeable number, because it can be changed into a prime (163646447) 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 11 ways as a sum of consecutive naturals, for example, 40558 + ... + 44409.

It is an arithmetic number, because the mean of its divisors is an integer number (14911884).

Almost surely, 2^163646442 is an apocalyptic number.

163646442 is an abundant number, since it is smaller than the sum of its proper divisors (194238774).

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

163646442 is a wasteful number, since it uses less digits than its factorization.

163646442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85082 (or 85079 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 163646442 is about 12792.4369062349. The cubic root of 163646442 is about 546.9767365642.

The spelling of 163646442 in words is "one hundred sixty-three million, six hundred forty-six thousand, four hundred forty-two".