491253122112 has 112 divisors (see below), whose sum is σ = 1305712676352. Its totient is φ = 163004497920.

The previous prime is 491253122111. The next prime is 491253122119. The reversal of 491253122112 is 211221352194.

It is not an unprimeable number, because it can be changed into a prime (491253122111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41134062 + ... + 41146002.

It is an arithmetic number, because the mean of its divisors is an integer number (11658148896).

Almost surely, 2^491253122112 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 491253122112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (652856338176).

491253122112 is an abundant number, since it is smaller than the sum of its proper divisors (814459554240).

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

491253122112 is a wasteful number, since it uses less digits than its factorization.

491253122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12916 (or 12906 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The spelling of 491253122112 in words is "four hundred ninety-one billion, two hundred fifty-three million, one hundred twenty-two thousand, one hundred twelve".