643475562 has 32 divisors (see below), whose sum is σ = 1305400320. Its totient is φ = 211438080.

The previous prime is 643475533. The next prime is 643475563. The reversal of 643475562 is 265574346.

It is not an unprimeable number, because it can be changed into a prime (643475563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127014 + ... + 131982.

It is an arithmetic number, because the mean of its divisors is an integer number (40793760).

Almost surely, 2^643475562 is an apocalyptic number.

643475562 is an abundant number, since it is smaller than the sum of its proper divisors (661924758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643475562 is a wasteful number, since it uses less digits than its factorization.

643475562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278.

The product of its digits is 604800, while the sum is 42.

The square root of 643475562 is about 25366.8201002806. The cubic root of 643475562 is about 863.3310338518.

The spelling of 643475562 in words is "six hundred forty-three million, four hundred seventy-five thousand, five hundred sixty-two".