643104624 has 20 divisors (see below), whose sum is σ = 1661353736. Its totient is φ = 214368192.

The previous prime is 643104617. The next prime is 643104629. The reversal of 643104624 is 426401346.

It is a junction number, because it is equal to n+sod(n) for n = 643104591 and 643104600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643104629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6698959 + ... + 6699054.

Almost surely, 2^643104624 is an apocalyptic number.

It is an amenable number.

643104624 is an abundant number, since it is smaller than the sum of its proper divisors (1018249112).

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

643104624 is a wasteful number, since it uses less digits than its factorization.

643104624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13398024 (or 13398018 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 643104624 is about 25359.5075661969. The cubic root of 643104624 is about 863.1651099943.

The spelling of 643104624 in words is "six hundred forty-three million, one hundred four thousand, six hundred twenty-four".