491366111 has 8 divisors (see below), whose sum is σ = 513345600. Its totient is φ = 469722400.

The previous prime is 491366047. The next prime is 491366119. The reversal of 491366111 is 111663194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491366111 - 2⁶ = 491366047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491366119) 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, 80951 + ... + 86808.

It is an arithmetic number, because the mean of its divisors is an integer number (64168200).

Almost surely, 2^491366111 is an apocalyptic number.

491366111 is a deficient number, since it is larger than the sum of its proper divisors (21979489).

491366111 is a wasteful number, since it uses less digits than its factorization.

491366111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167889.

The product of its digits is 3888, while the sum is 32.

The square root of 491366111 is about 22166.7794458284. The cubic root of 491366111 is about 789.1054934462.

The spelling of 491366111 in words is "four hundred ninety-one million, three hundred sixty-six thousand, one hundred eleven".