111550605643 has 2 divisors, whose sum is σ = 111550605644. Its totient is φ = 111550605642.

The previous prime is 111550605641. The next prime is 111550605707. The reversal of 111550605643 is 346506055111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111550605643 - 2¹ = 111550605641 is a prime.

Together with 111550605641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111550605641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55775302821 + 55775302822.

It is an arithmetic number, because the mean of its divisors is an integer number (55775302822).

Almost surely, 2^111550605643 is an apocalyptic number.

111550605643 is a deficient number, since it is larger than the sum of its proper divisors (1).

111550605643 is an equidigital number, since it uses as much as digits as its factorization.

111550605643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 111550605643 in words is "one hundred eleven billion, five hundred fifty million, six hundred five thousand, six hundred forty-three".