643152706 has 16 divisors (see below), whose sum is σ = 1102907520. Its totient is φ = 275546880.

The previous prime is 643152661. The next prime is 643152709. The reversal of 643152706 is 607251346.

It is a happy number.

643152706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (643152709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54691 + ... + 65401.

It is an arithmetic number, because the mean of its divisors is an integer number (68931720).

Almost surely, 2^643152706 is an apocalyptic number.

643152706 is a deficient number, since it is larger than the sum of its proper divisors (459754814).

643152706 is a wasteful number, since it uses less digits than its factorization.

643152706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15009.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 643152706 is about 25360.4555558452. The cubic root of 643152706 is about 863.1866210978.

The spelling of 643152706 in words is "six hundred forty-three million, one hundred fifty-two thousand, seven hundred six".