2091117648 has 80 divisors (see below), whose sum is σ = 5671065600. Its totient is φ = 663093120.

The previous prime is 2091117619. The next prime is 2091117673. The reversal of 2091117648 is 8467111902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75883 + ... + 99701.

It is an arithmetic number, because the mean of its divisors is an integer number (70888320).

Almost surely, 2^2091117648 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 2091117648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2835532800).

2091117648 is an abundant number, since it is smaller than the sum of its proper divisors (3579947952).

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

2091117648 is a wasteful number, since it uses less digits than its factorization.

2091117648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23920 (or 23914 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 2091117648 is about 45728.7398470590. The cubic root of 2091117648 is about 1278.7711285350.

The spelling of 2091117648 in words is "two billion, ninety-one million, one hundred seventeen thousand, six hundred forty-eight".