643674412 has 12 divisors (see below), whose sum is σ = 1175405616. Its totient is φ = 307844240.

The previous prime is 643674407. The next prime is 643674431. The reversal of 643674412 is 214476346.

643674412 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 3 ways as a sum of consecutive naturals, for example, 3498139 + ... + 3498322.

It is an arithmetic number, because the mean of its divisors is an integer number (97950468).

Almost surely, 2^643674412 is an apocalyptic number.

It is an amenable number.

643674412 is a deficient number, since it is larger than the sum of its proper divisors (531731204).

643674412 is a wasteful number, since it uses less digits than its factorization.

643674412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6996488 (or 6996486 counting only the distinct ones).

The product of its digits is 96768, while the sum is 37.

The square root of 643674412 is about 25370.7392876124. The cubic root of 643674412 is about 863.4199549678.

The spelling of 643674412 in words is "six hundred forty-three million, six hundred seventy-four thousand, four hundred twelve".