491418863 has 8 divisors (see below), whose sum is σ = 533085168. Its totient is φ = 450304704.

The previous prime is 491418853. The next prime is 491418877. The reversal of 491418863 is 368814194.

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 491418863 - 2⁸ = 491418607 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 (491418853) 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, 136181 + ... + 139742.

It is an arithmetic number, because the mean of its divisors is an integer number (66635646).

Almost surely, 2^491418863 is an apocalyptic number.

491418863 is a deficient number, since it is larger than the sum of its proper divisors (41666305).

491418863 is a wasteful number, since it uses less digits than its factorization.

491418863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276073.

The product of its digits is 165888, while the sum is 44.

The square root of 491418863 is about 22167.9693025771. The cubic root of 491418863 is about 789.1337313205.

The spelling of 491418863 in words is "four hundred ninety-one million, four hundred eighteen thousand, eight hundred sixty-three".