2591989911 has 12 divisors (see below), whose sum is σ = 4278840592. Its totient is φ = 1481137056.

The previous prime is 2591989901. The next prime is 2591989913. The reversal of 2591989911 is 1199891952.

It is not a de Polignac number, because 2591989911 - 2¹¹ = 2591987863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2591989913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20571286 + ... + 20571411.

Almost surely, 2^2591989911 is an apocalyptic number.

2591989911 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2591989911 is a deficient number, since it is larger than the sum of its proper divisors (1686850681).

2591989911 is a wasteful number, since it uses less digits than its factorization.

2591989911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41142710 (or 41142707 counting only the distinct ones).

The product of its digits is 524880, while the sum is 54.

The square root of 2591989911 is about 50911.5891619973. The cubic root of 2591989911 is about 1373.6553088052.

The spelling of 2591989911 in words is "two billion, five hundred ninety-one million, nine hundred eighty-nine thousand, nine hundred eleven".