491271845 has 8 divisors (see below), whose sum is σ = 590073120. Its totient is φ = 392652880.

The previous prime is 491271839. The next prime is 491271853. The reversal of 491271845 is 548172194.

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

It is not a de Polignac number, because 491271845 - 2²² = 487077541 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39575 + ... + 50484.

It is an arithmetic number, because the mean of its divisors is an integer number (73759140).

Almost surely, 2^491271845 is an apocalyptic number.

It is an amenable number.

491271845 is a deficient number, since it is larger than the sum of its proper divisors (98801275).

491271845 is a wasteful number, since it uses less digits than its factorization.

491271845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91155.

The product of its digits is 80640, while the sum is 41.

The square root of 491271845 is about 22164.6530539054. The cubic root of 491271845 is about 789.0550283082.

The spelling of 491271845 in words is "four hundred ninety-one million, two hundred seventy-one thousand, eight hundred forty-five".