643256462 has 8 divisors (see below), whose sum is σ = 988418592. Its totient is φ = 313783600.

The previous prime is 643256461. The next prime is 643256477. The reversal of 643256462 is 264652346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643256461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3922214 + ... + 3922377.

It is an arithmetic number, because the mean of its divisors is an integer number (123552324).

Almost surely, 2^643256462 is an apocalyptic number.

643256462 is a deficient number, since it is larger than the sum of its proper divisors (345162130).

643256462 is a wasteful number, since it uses less digits than its factorization.

643256462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7844634.

The product of its digits is 207360, while the sum is 38.

The square root of 643256462 is about 25362.5010990636. The cubic root of 643256462 is about 863.2330361895.

The spelling of 643256462 in words is "six hundred forty-three million, two hundred fifty-six thousand, four hundred sixty-two".