491457111 has 8 divisors (see below), whose sum is σ = 660278784. Its totient is φ = 325136760.

The previous prime is 491457091. The next prime is 491457137. The reversal of 491457111 is 111754194.

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

It is not a de Polignac number, because 491457111 - 2⁶ = 491457047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491457151) 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, 624871 + ... + 625656.

It is an arithmetic number, because the mean of its divisors is an integer number (82534848).

Almost surely, 2^491457111 is an apocalyptic number.

491457111 is a deficient number, since it is larger than the sum of its proper divisors (168821673).

491457111 is a wasteful number, since it uses less digits than its factorization.

491457111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250661.

The product of its digits is 5040, while the sum is 33.

The square root of 491457111 is about 22168.8319719375. The cubic root of 491457111 is about 789.1542040144.

The spelling of 491457111 in words is "four hundred ninety-one million, four hundred fifty-seven thousand, one hundred eleven".