643000160 has 96 divisors (see below), whose sum is σ = 1673747712. Its totient is φ = 231482880.

The previous prime is 643000159. The next prime is 643000177. The reversal of 643000160 is 61000346.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179507 + ... + 183053.

It is an arithmetic number, because the mean of its divisors is an integer number (17434872).

Almost surely, 2^643000160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643000160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (836873856).

643000160 is an abundant number, since it is smaller than the sum of its proper divisors (1030747552).

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

643000160 is a wasteful number, since it uses less digits than its factorization.

643000160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676 (or 3668 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 643000160 is about 25357.4478211038. The cubic root of 643000160 is about 863.1183708068.

The spelling of 643000160 in words is "six hundred forty-three million, one hundred sixty", and thus it is an aban number.