2126911806791 has 8 divisors (see below), whose sum is σ = 2283742918944. Its totient is φ = 1973604989440.

The previous prime is 2126911806779. The next prime is 2126911806793. The reversal of 2126911806791 is 1976081196212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2126911806791 - 2²⁶ = 2126844697927 is a prime.

It is a super-2 number, since 2×2126911806791² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126911806793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881072450 + ... + 881074863.

It is an arithmetic number, because the mean of its divisors is an integer number (285467864868).

Almost surely, 2^{2126911806791} is an apocalyptic number.

2126911806791 is a deficient number, since it is larger than the sum of its proper divisors (156831112153).

2126911806791 is a wasteful number, since it uses less digits than its factorization.

2126911806791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762147401.

The product of its (nonzero) digits is 653184, while the sum is 53.

The spelling of 2126911806791 in words is "two trillion, one hundred twenty-six billion, nine hundred eleven million, eight hundred six thousand, seven hundred ninety-one".