2591117136 has 120 divisors (see below), whose sum is σ = 7363216224. Its totient is φ = 850510080.

The previous prime is 2591117117. The next prime is 2591117149. The reversal of 2591117136 is 6317111952.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2591117136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3250690 + ... + 3251486.

Almost surely, 2^2591117136 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 2591117136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3681608112).

2591117136 is an abundant number, since it is smaller than the sum of its proper divisors (4772099088).

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

2591117136 is a wasteful number, since it uses less digits than its factorization.

2591117136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129 (or 1120 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 2591117136 is about 50903.0169636339. The cubic root of 2591117136 is about 1373.5011123973.

The spelling of 2591117136 in words is "two billion, five hundred ninety-one million, one hundred seventeen thousand, one hundred thirty-six".