163642320 has 60 divisors (see below), whose sum is σ = 549567876. Its totient is φ = 43637760.

The previous prime is 163642313. The next prime is 163642327. The reversal of 163642320 is 23246361.

163642320 is a `hidden beast` number, since 1 + 636 + 4 + 2 + 3 + 20 = 666.

163642320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (163642313) and next prime (163642327).

It can be written as a sum of positive squares in 2 ways, for example, as 57881664 + 105760656 = 7608^2 + 10284^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163642327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112921 + ... + 114360.

Almost surely, 2^163642320 is an apocalyptic number.

163642320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163642320 is an abundant number, since it is smaller than the sum of its proper divisors (385925556).

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

163642320 is a wasteful number, since it uses less digits than its factorization.

163642320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227300 (or 227291 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 163642320 is about 12792.2757944003. The cubic root of 163642320 is about 546.9721440272.

Adding to 163642320 its reverse (23246361), we get a palindrome (186888681).

It can be divided in two parts, 1636 and 42320, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 163642320 in words is "one hundred sixty-three million, six hundred forty-two thousand, three hundred twenty".