643214000000 has 672 divisors, whose sum is σ = 1903032672120. Its totient is φ = 214656000000.

The previous prime is 643213999991. The next prime is 643214000029. The reversal of 643214000000 is 412346.

It is a happy number.

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 83 ways as a sum of consecutive naturals, for example, 3717999914 + ... + 3718000086.

Almost surely, 2^643214000000 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 643214000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (951516336060).

643214000000 is an abundant number, since it is smaller than the sum of its proper divisors (1259818672120).

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

643214000000 is an equidigital number, since it uses as much as digits as its factorization.

643214000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 643214000000 its reverse (412346), we get a palindrome (643214412346).

The spelling of 643214000000 in words is "six hundred forty-three billion, two hundred fourteen million", and thus it is an aban number.