643623524612 has 24 divisors (see below), whose sum is σ = 1185857349600. Its totient is φ = 304813855296.

The previous prime is 643623524563. The next prime is 643623524623. The reversal of 643623524612 is 216425326346.

643623524612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452513 + ... + 1221480.

It is an arithmetic number, because the mean of its divisors is an integer number (49410722900).

Almost surely, 2^643623524612 is an apocalyptic number.

It is an amenable number.

643623524612 is a deficient number, since it is larger than the sum of its proper divisors (542233824988).

643623524612 is a wasteful number, since it uses less digits than its factorization.

643623524612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679075 (or 1679073 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 44.

The spelling of 643623524612 in words is "six hundred forty-three billion, six hundred twenty-three million, five hundred twenty-four thousand, six hundred twelve".