643036364 has 6 divisors (see below), whose sum is σ = 1125313644. Its totient is φ = 321518180.

The previous prime is 643036363. The next prime is 643036403. The reversal of 643036364 is 463630346.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (643036363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80379542 + ... + 80379549.

It is an arithmetic number, because the mean of its divisors is an integer number (187552274).

Almost surely, 2^643036364 is an apocalyptic number.

It is an amenable number.

643036364 is a deficient number, since it is larger than the sum of its proper divisors (482277280).

643036364 is a wasteful number, since it uses less digits than its factorization.

643036364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160759095 (or 160759093 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 35.

The square root of 643036364 is about 25358.1616841600. The cubic root of 643036364 is about 863.1345697406.

The spelling of 643036364 in words is "six hundred forty-three million, thirty-six thousand, three hundred sixty-four".