646006322 has 16 divisors (see below), whose sum is σ = 1055277720. Its totient is φ = 294805632.

The previous prime is 646006297. The next prime is 646006343. The reversal of 646006322 is 223600646.

It can be written as a sum of positive squares in 4 ways, for example, as 532178761 + 113827561 = 23069^2 + 10669^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137273 + ... + 141900.

Almost surely, 2^646006322 is an apocalyptic number.

646006322 is a deficient number, since it is larger than the sum of its proper divisors (409271398).

646006322 is a wasteful number, since it uses less digits than its factorization.

646006322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279277.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 646006322 is about 25416.6544218550. The cubic root of 646006322 is about 864.4613671382.

Adding to 646006322 its reverse (223600646), we get a palindrome (869606968).

The spelling of 646006322 in words is "six hundred forty-six million, six thousand, three hundred twenty-two".