491356266 has 16 divisors (see below), whose sum is σ = 983361600. Its totient is φ = 163677248.

The previous prime is 491356223. The next prime is 491356267. The reversal of 491356266 is 662653194.

It is not an unprimeable number, because it can be changed into a prime (491356267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16911 + ... + 35618.

It is an arithmetic number, because the mean of its divisors is an integer number (61460100).

Almost surely, 2^491356266 is an apocalyptic number.

491356266 is an abundant number, since it is smaller than the sum of its proper divisors (492005334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491356266 is a wasteful number, since it uses less digits than its factorization.

491356266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54093.

The product of its digits is 233280, while the sum is 42.

The square root of 491356266 is about 22166.5573781767. The cubic root of 491356266 is about 789.1002232445.

The spelling of 491356266 in words is "four hundred ninety-one million, three hundred fifty-six thousand, two hundred sixty-six".