643313710 has 48 divisors (see below), whose sum is σ = 1258650576. Its totient is φ = 236630784.

The previous prime is 643313707. The next prime is 643313719. The reversal of 643313710 is 17313346.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643313719) 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, 585882 + ... + 586978.

It is an arithmetic number, because the mean of its divisors is an integer number (26221887).

Almost surely, 2^643313710 is an apocalyptic number.

643313710 is a deficient number, since it is larger than the sum of its proper divisors (615336866).

643313710 is a wasteful number, since it uses less digits than its factorization.

643313710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477 (or 1464 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 643313710 is about 25363.6296692725. The cubic root of 643313710 is about 863.2586438602.

The spelling of 643313710 in words is "six hundred forty-three million, three hundred thirteen thousand, seven hundred ten".