111943905643 has 2 divisors, whose sum is σ = 111943905644. Its totient is φ = 111943905642.

The previous prime is 111943905641. The next prime is 111943905673. The reversal of 111943905643 is 346509349111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111943905643 - 2¹ = 111943905641 is a prime.

Together with 111943905641, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 111943905593 and 111943905602.

It is not a weakly prime, because it can be changed into another prime (111943905641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55971952821 + 55971952822.

It is an arithmetic number, because the mean of its divisors is an integer number (55971952822).

Almost surely, 2^111943905643 is an apocalyptic number.

111943905643 is a deficient number, since it is larger than the sum of its proper divisors (1).

111943905643 is an equidigital number, since it uses as much as digits as its factorization.

111943905643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 111943905643 in words is "one hundred eleven billion, nine hundred forty-three million, nine hundred five thousand, six hundred forty-three".