646459552 has 24 divisors (see below), whose sum is σ = 1274707476. Its totient is φ = 322724352.

The previous prime is 646459469. The next prime is 646459579. The reversal of 646459552 is 255954646.

It can be written as a sum of positive squares in 2 ways, for example, as 566249616 + 80209936 = 23796^2 + 8956^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

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, 5428 + ... + 36364.

Almost surely, 2^646459552 is an apocalyptic number.

It is an amenable number.

646459552 is a deficient number, since it is larger than the sum of its proper divisors (628247924).

646459552 is a wasteful number, since it uses less digits than its factorization.

646459552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31600 (or 31592 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 46.

The square root of 646459552 is about 25425.5688628593. The cubic root of 646459552 is about 864.6634849919.

The spelling of 646459552 in words is "six hundred forty-six million, four hundred fifty-nine thousand, five hundred fifty-two".