2491591180 has 96 divisors (see below), whose sum is σ = 5722472448. Its totient is φ = 905798400.

The previous prime is 2491591159. The next prime is 2491591217. The reversal of 2491591180 is 811951942.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6505269 + ... + 6505651.

It is an arithmetic number, because the mean of its divisors is an integer number (59609088).

Almost surely, 2^2491591180 is an apocalyptic number.

2491591180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491591180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2861236224).

2491591180 is an abundant number, since it is smaller than the sum of its proper divisors (3230881268).

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

2491591180 is a wasteful number, since it uses less digits than its factorization.

2491591180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 2491591180 is about 49915.8409725810. The cubic root of 2491591180 is about 1355.6854290996.

The spelling of 2491591180 in words is "two billion, four hundred ninety-one million, five hundred ninety-one thousand, one hundred eighty".