643213630224 has 120 divisors (see below), whose sum is σ = 1997034904800. Its totient is φ = 191609579520.

The previous prime is 643213630223. The next prime is 643213630247. The reversal of 643213630224 is 422036312346.

643213630224 is a `hidden beast` number, since 6 + 4 + 3 + 2 + 13 + 630 + 2 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (643213630223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3347809 + ... + 3534720.

It is an arithmetic number, because the mean of its divisors is an integer number (16641957540).

Almost surely, 2^643213630224 is an apocalyptic number.

It is an amenable number.

643213630224 is an abundant number, since it is smaller than the sum of its proper divisors (1353821274576).

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

643213630224 is a wasteful number, since it uses less digits than its factorization.

643213630224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6882613 (or 6882604 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

The spelling of 643213630224 in words is "six hundred forty-three billion, two hundred thirteen million, six hundred thirty thousand, two hundred twenty-four".