105404043543 has 4 divisors (see below), whose sum is σ = 140538724728. Its totient is φ = 70269362360.

The previous prime is 105404043527. The next prime is 105404043557. The reversal of 105404043543 is 345340404501.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105404043543 - 2⁴ = 105404043527 is a prime.

It is a super-2 number, since 2×105404043543² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105404043583) 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, 17567340588 + ... + 17567340593.

It is an arithmetic number, because the mean of its divisors is an integer number (35134681182).

Almost surely, 2^105404043543 is an apocalyptic number.

105404043543 is a deficient number, since it is larger than the sum of its proper divisors (35134681185).

105404043543 is an equidigital number, since it uses as much as digits as its factorization.

105404043543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35134681184.

The product of its (nonzero) digits is 57600, while the sum is 33.

The spelling of 105404043543 in words is "one hundred five billion, four hundred four million, forty-three thousand, five hundred forty-three".