643162252 has 6 divisors (see below), whose sum is σ = 1125533948. Its totient is φ = 321581124.

The previous prime is 643162199. The next prime is 643162259. The reversal of 643162252 is 252261346.

It is not an unprimeable number, because it can be changed into a prime (643162259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80395278 + ... + 80395285.

Almost surely, 2^643162252 is an apocalyptic number.

It is an amenable number.

643162252 is a deficient number, since it is larger than the sum of its proper divisors (482371696).

643162252 is a wasteful number, since it uses less digits than its factorization.

643162252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160790567 (or 160790565 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 643162252 is about 25360.6437615452. The cubic root of 643162252 is about 863.1908916952.

The spelling of 643162252 in words is "six hundred forty-three million, one hundred sixty-two thousand, two hundred fifty-two".