491111426 has 16 divisors (see below), whose sum is σ = 793800000. Its totient is φ = 226533648.

The previous prime is 491111377. The next prime is 491111431. The reversal of 491111426 is 624111194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50075 + ... + 59073.

It is an arithmetic number, because the mean of its divisors is an integer number (49612500).

Almost surely, 2^491111426 is an apocalyptic number.

491111426 is a deficient number, since it is larger than the sum of its proper divisors (302688574).

491111426 is a wasteful number, since it uses less digits than its factorization.

491111426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11113.

The product of its digits is 1728, while the sum is 29.

The square root of 491111426 is about 22161.0339560229. The cubic root of 491111426 is about 788.9691334348.

The spelling of 491111426 in words is "four hundred ninety-one million, one hundred eleven thousand, four hundred twenty-six".