2491891110 has 96 divisors (see below), whose sum is σ = 6872872032. Its totient is φ = 624245760.

The previous prime is 2491891099. The next prime is 2491891117. The reversal of 2491891110 is 111981942.

2491891110 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491891117) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1056052 + ... + 1058408.

It is an arithmetic number, because the mean of its divisors is an integer number (71592417).

Almost surely, 2^2491891110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491891110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3436436016).

2491891110 is an abundant number, since it is smaller than the sum of its proper divisors (4380980922).

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

2491891110 is a wasteful number, since it uses less digits than its factorization.

2491891110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078 (or 3075 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 2491891110 is about 49918.8452390477. The cubic root of 2491891110 is about 1355.7398246494.

The spelling of 2491891110 in words is "two billion, four hundred ninety-one million, eight hundred ninety-one thousand, one hundred ten".