11856340843 has 2 divisors, whose sum is σ = 11856340844. Its totient is φ = 11856340842.

The previous prime is 11856340829. The next prime is 11856340883. The reversal of 11856340843 is 34804365811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11856340843 - 2³³ = 3266406251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11856340843.

It is not a weakly prime, because it can be changed into another prime (11856340883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5928170421 + 5928170422.

It is an arithmetic number, because the mean of its divisors is an integer number (5928170422).

Almost surely, 2^11856340843 is an apocalyptic number.

11856340843 is a deficient number, since it is larger than the sum of its proper divisors (1).

11856340843 is an equidigital number, since it uses as much as digits as its factorization.

11856340843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 11856340843 in words is "eleven billion, eight hundred fifty-six million, three hundred forty thousand, eight hundred forty-three".