491851461 has 8 divisors (see below), whose sum is σ = 690317920. Its totient is φ = 310642992.

The previous prime is 491851447. The next prime is 491851511. The reversal of 491851461 is 164158194.

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

It is not a de Polignac number, because 491851461 - 2⁹ = 491850949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491851411) 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, 4314430 + ... + 4314543.

It is an arithmetic number, because the mean of its divisors is an integer number (86289740).

Almost surely, 2^491851461 is an apocalyptic number.

It is an amenable number.

491851461 is a deficient number, since it is larger than the sum of its proper divisors (198466459).

491851461 is a wasteful number, since it uses less digits than its factorization.

491851461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8628995.

The product of its digits is 34560, while the sum is 39.

The square root of 491851461 is about 22177.7244324119. The cubic root of 491851461 is about 789.3652226045.

The spelling of 491851461 in words is "four hundred ninety-one million, eight hundred fifty-one thousand, four hundred sixty-one".