643074364 has 12 divisors (see below), whose sum is σ = 1127382984. Its totient is φ = 320964944.

The previous prime is 643074347. The next prime is 643074371. The reversal of 643074364 is 463470346.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 140527 + ... + 145030.

It is an arithmetic number, because the mean of its divisors is an integer number (93948582).

Almost surely, 2^643074364 is an apocalyptic number.

It is an amenable number.

643074364 is a deficient number, since it is larger than the sum of its proper divisors (484308620).

643074364 is a wasteful number, since it uses less digits than its factorization.

643074364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286124 (or 286122 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 37.

The square root of 643074364 is about 25358.9109387608. The cubic root of 643074364 is about 863.1515716135.

The spelling of 643074364 in words is "six hundred forty-three million, seventy-four thousand, three hundred sixty-four".