646316576 has 24 divisors (see below), whose sum is σ = 1286738460. Its totient is φ = 319525888.

The previous prime is 646316569. The next prime is 646316581. The reversal of 646316576 is 675613646.

It can be written as a sum of positive squares in 2 ways, for example, as 624000400 + 22316176 = 24980^2 + 4724^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110621 + ... + 116316.

Almost surely, 2^646316576 is an apocalyptic number.

It is an amenable number.

646316576 is a deficient number, since it is larger than the sum of its proper divisors (640421884).

646316576 is a wasteful number, since it uses less digits than its factorization.

646316576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227036 (or 227028 counting only the distinct ones).

The product of its digits is 544320, while the sum is 44.

The square root of 646316576 is about 25422.7570495413. The cubic root of 646316576 is about 864.5997350681.

The spelling of 646316576 in words is "six hundred forty-six million, three hundred sixteen thousand, five hundred seventy-six".