643574675 has 6 divisors (see below), whose sum is σ = 798032628. Its totient is φ = 514859720.

The previous prime is 643574653. The next prime is 643574677. The reversal of 643574675 is 576475346.

643574675 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 643574675 - 2¹² = 643570579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643574677) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12871469 + ... + 12871518.

It is an arithmetic number, because the mean of its divisors is an integer number (133005438).

Almost surely, 2^643574675 is an apocalyptic number.

643574675 is a deficient number, since it is larger than the sum of its proper divisors (154457953).

643574675 is a wasteful number, since it uses less digits than its factorization.

643574675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25742997 (or 25742992 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 47.

The square root of 643574675 is about 25368.7736203388. The cubic root of 643574675 is about 863.3753571801.

The spelling of 643574675 in words is "six hundred forty-three million, five hundred seventy-four thousand, six hundred seventy-five".