2049591544 has 128 divisors (see below), whose sum is σ = 5188538880. Its totient is φ = 733017600.

The previous prime is 2049591493. The next prime is 2049591569. The reversal of 2049591544 is 4451959402.

It is a self number, because there is not a number n which added to its sum of digits gives 2049591544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1689082 + ... + 1690294.

It is an arithmetic number, because the mean of its divisors is an integer number (40535460).

Almost surely, 2^2049591544 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 2049591544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2594269440).

2049591544 is an abundant number, since it is smaller than the sum of its proper divisors (3138947336).

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

2049591544 is a wasteful number, since it uses less digits than its factorization.

2049591544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461 (or 1457 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 2049591544 is about 45272.4148240405. The cubic root of 2049591544 is about 1270.2497171550.

The spelling of 2049591544 in words is "two billion, forty-nine million, five hundred ninety-one thousand, five hundred forty-four".