491109854 has 8 divisors (see below), whose sum is σ = 737868360. Its totient is φ = 245153736.

The previous prime is 491109851. The next prime is 491109859. The reversal of 491109854 is 458901194.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491109851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199064 + ... + 201515.

It is an arithmetic number, because the mean of its divisors is an integer number (92233545).

Almost surely, 2^491109854 is an apocalyptic number.

491109854 is a deficient number, since it is larger than the sum of its proper divisors (246758506).

491109854 is a wasteful number, since it uses less digits than its factorization.

491109854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401194.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 491109854 is about 22160.9984883353. The cubic root of 491109854 is about 788.9682916294.

The spelling of 491109854 in words is "four hundred ninety-one million, one hundred nine thousand, eight hundred fifty-four".