643264352 has 24 divisors (see below), whose sum is σ = 1269313416. Its totient is φ = 320899072.

The previous prime is 643264319. The next prime is 643264381. The reversal of 643264352 is 253462346.

It is a congruent number.

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, 8513 + ... + 36864.

It is an arithmetic number, because the mean of its divisors is an integer number (52888059).

Almost surely, 2^643264352 is an apocalyptic number.

It is an amenable number.

643264352 is a deficient number, since it is larger than the sum of its proper divisors (626049064).

643264352 is a wasteful number, since it uses less digits than its factorization.

643264352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45830 (or 45822 counting only the distinct ones).

The product of its digits is 103680, while the sum is 35.

The square root of 643264352 is about 25362.6566431831. The cubic root of 643264352 is about 863.2365655650.

The spelling of 643264352 in words is "six hundred forty-three million, two hundred sixty-four thousand, three hundred fifty-two".