491766256 has 10 divisors (see below), whose sum is σ = 952797152. Its totient is φ = 245883120.

The previous prime is 491766251. The next prime is 491766263. The reversal of 491766256 is 652667194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491766251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15367680 + ... + 15367711.

Almost surely, 2^491766256 is an apocalyptic number.

It is an amenable number.

491766256 is a deficient number, since it is larger than the sum of its proper divisors (461030896).

491766256 is a wasteful number, since it uses less digits than its factorization.

491766256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30735399 (or 30735393 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 491766256 is about 22175.8033901818. The cubic root of 491766256 is about 789.3196385524.

The spelling of 491766256 in words is "four hundred ninety-one million, seven hundred sixty-six thousand, two hundred fifty-six".