42165563443 has 4 divisors (see below), whose sum is σ = 42166401928. Its totient is φ = 42164724960.

The previous prime is 42165563399. The next prime is 42165563449. The reversal of 42165563443 is 34436556124.

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 42165563443 - 2¹³ = 42165555251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42165563443.

It is not an unprimeable number, because it can be changed into a prime (42165563449) 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, 338646 + ... + 446107.

It is an arithmetic number, because the mean of its divisors is an integer number (10541600482).

Almost surely, 2^42165563443 is an apocalyptic number.

42165563443 is a deficient number, since it is larger than the sum of its proper divisors (838485).

42165563443 is an equidigital number, since it uses as much as digits as its factorization.

42165563443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838484.

The product of its digits is 1036800, while the sum is 43.

The spelling of 42165563443 in words is "forty-two billion, one hundred sixty-five million, five hundred sixty-three thousand, four hundred forty-three".