643160000 has 140 divisors (see below), whose sum is σ = 1823453808. Its totient is φ = 220416000.

The previous prime is 643159973. The next prime is 643160009. The reversal of 643160000 is 61346.

643160000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (140).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643160009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 278852 + ... + 281148.

Almost surely, 2^643160000 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 643160000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911726904).

643160000 is an abundant number, since it is smaller than the sum of its proper divisors (1180293808).

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

643160000 is an equidigital number, since it uses as much as digits as its factorization.

643160000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336 (or 2311 counting only the distinct ones).

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

The square root of 643160000 is about 25360.5993620025. The cubic root of 643160000 is about 863.1898842210.

The spelling of 643160000 in words is "six hundred forty-three million, one hundred sixty thousand".