643264466 has 32 divisors (see below), whose sum is σ = 1075915008. Its totient is φ = 286554240.

The previous prime is 643264463. The next prime is 643264471. The reversal of 643264466 is 664462346.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (643264463) 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, 85601 + ... + 92811.

It is an arithmetic number, because the mean of its divisors is an integer number (33622344).

Almost surely, 2^643264466 is an apocalyptic number.

643264466 is a deficient number, since it is larger than the sum of its proper divisors (432650542).

643264466 is a wasteful number, since it uses less digits than its factorization.

643264466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7346.

The product of its digits is 497664, while the sum is 41.

The square root of 643264466 is about 25362.6588905816. The cubic root of 643264466 is about 863.2366165596.

The spelling of 643264466 in words is "six hundred forty-three million, two hundred sixty-four thousand, four hundred sixty-six".