2391806844791 has 16 divisors (see below), whose sum is σ = 2944394095104. Its totient is φ = 1892012429664.

The previous prime is 2391806844787. The next prime is 2391806844793. The reversal of 2391806844791 is 1974486081932.

It is not a de Polignac number, because 2391806844791 - 2² = 2391806844787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391806844793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2393981 + ... + 3242646.

It is an arithmetic number, because the mean of its divisors is an integer number (184024630944).

Almost surely, 2^{2391806844791} is an apocalyptic number.

2391806844791 is a deficient number, since it is larger than the sum of its proper divisors (552587250313).

2391806844791 is a wasteful number, since it uses less digits than its factorization.

2391806844791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5641310.

The product of its (nonzero) digits is 20901888, while the sum is 62.

The spelling of 2391806844791 in words is "two trillion, three hundred ninety-one billion, eight hundred six million, eight hundred forty-four thousand, seven hundred ninety-one".