491555326 has 4 divisors (see below), whose sum is σ = 737332992. Its totient is φ = 245777662.

The previous prime is 491555303. The next prime is 491555359. The reversal of 491555326 is 623555194.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122888830 + ... + 122888833.

It is an arithmetic number, because the mean of its divisors is an integer number (184333248).

Almost surely, 2^491555326 is an apocalyptic number.

491555326 is a deficient number, since it is larger than the sum of its proper divisors (245777666).

491555326 is a wasteful number, since it uses less digits than its factorization.

491555326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245777665.

The product of its digits is 162000, while the sum is 40.

The square root of 491555326 is about 22171.0470208333. The cubic root of 491555326 is about 789.2067698883.

The spelling of 491555326 in words is "four hundred ninety-one million, five hundred fifty-five thousand, three hundred twenty-six".