491601216 has 56 divisors (see below), whose sum is σ = 1322771040. Its totient is φ = 161085952.

The previous prime is 491601197. The next prime is 491601221. The reversal of 491601216 is 612106194.

It is a happy 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, 10371 + ... + 33026.

Almost surely, 2^491601216 is an apocalyptic number.

It is an amenable number.

491601216 is an abundant number, since it is smaller than the sum of its proper divisors (831169824).

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

491601216 is a wasteful number, since it uses less digits than its factorization.

491601216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43471 (or 43461 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 491601216 is about 22172.0819049543. The cubic root of 491601216 is about 789.2313283797.

The spelling of 491601216 in words is "four hundred ninety-one million, six hundred one thousand, two hundred sixteen".