491317564 has 6 divisors (see below), whose sum is σ = 859805744. Its totient is φ = 245658780.

The previous prime is 491317529. The next prime is 491317577. The reversal of 491317564 is 465713194.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61414692 + ... + 61414699.

Almost surely, 2^491317564 is an apocalyptic number.

It is an amenable number.

491317564 is a deficient number, since it is larger than the sum of its proper divisors (368488180).

491317564 is a wasteful number, since it uses less digits than its factorization.

491317564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122829395 (or 122829393 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 491317564 is about 22165.6843792381. The cubic root of 491317564 is about 789.0795047009.

The spelling of 491317564 in words is "four hundred ninety-one million, three hundred seventeen thousand, five hundred sixty-four".