646222259 has 8 divisors (see below), whose sum is σ = 651630000. Its totient is φ = 640825632.

The previous prime is 646222219. The next prime is 646222261. The reversal of 646222259 is 952222646.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646222259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646222219) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 146417 + ... + 150765.

It is an arithmetic number, because the mean of its divisors is an integer number (81453750).

Almost surely, 2^646222259 is an apocalyptic number.

646222259 is a deficient number, since it is larger than the sum of its proper divisors (5407741).

646222259 is a wasteful number, since it uses less digits than its factorization.

646222259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557.

The product of its digits is 103680, while the sum is 38.

The square root of 646222259 is about 25420.9020099602. The cubic root of 646222259 is about 864.5576759992.

The spelling of 646222259 in words is "six hundred forty-six million, two hundred twenty-two thousand, two hundred fifty-nine".