491563264 has 36 divisors (see below), whose sum is σ = 982624384. Its totient is φ = 245426688.

The previous prime is 491563223. The next prime is 491563297. The reversal of 491563264 is 462365194.

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 3 ways as a sum of consecutive naturals, for example, 338989 + ... + 340435.

Almost surely, 2^491563264 is an apocalyptic number.

It is an amenable number.

491563264 is a deficient number, since it is larger than the sum of its proper divisors (491061120).

491563264 is a wasteful number, since it uses less digits than its factorization.

491563264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790 (or 2776 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The square root of 491563264 is about 22171.2260373665. The cubic root of 491563264 is about 789.2110180976.

The spelling of 491563264 in words is "four hundred ninety-one million, five hundred sixty-three thousand, two hundred sixty-four".