111408361543 has 4 divisors (see below), whose sum is σ = 111409185888. Its totient is φ = 111407537200.

The previous prime is 111408361529. The next prime is 111408361549. The reversal of 111408361543 is 345163804111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 111408361543 - 2²¹ = 111406264391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111408361549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156646 + ... + 497347.

It is an arithmetic number, because the mean of its divisors is an integer number (27852296472).

Almost surely, 2^111408361543 is an apocalyptic number.

111408361543 is a deficient number, since it is larger than the sum of its proper divisors (824345).

111408361543 is an equidigital number, since it uses as much as digits as its factorization.

111408361543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824344.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 111408361543 in words is "one hundred eleven billion, four hundred eight million, three hundred sixty-one thousand, five hundred forty-three".