491851416 has 144 divisors (see below), whose sum is σ = 1479922920. Its totient is φ = 135744000.

The previous prime is 491851411. The next prime is 491851417. The reversal of 491851416 is 614158194.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4869766 + ... + 4869866.

Almost surely, 2^491851416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491851416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739961460).

491851416 is an abundant number, since it is smaller than the sum of its proper divisors (988071504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491851416 is a wasteful number, since it uses less digits than its factorization.

491851416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 154 counting only the distinct ones).

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

The square root of 491851416 is about 22177.7234178804. The cubic root of 491851416 is about 789.3651985312.

The spelling of 491851416 in words is "four hundred ninety-one million, eight hundred fifty-one thousand, four hundred sixteen".