42443541505 has 4 divisors (see below), whose sum is σ = 50932249812. Its totient is φ = 33954833200.

The previous prime is 42443541463. The next prime is 42443541509. The reversal of 42443541505 is 50514534424.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32326601616 + 10116939889 = 179796^2 + 100583^2 .

It is not a de Polignac number, because 42443541505 - 2¹⁹ = 42443017217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42443541509) 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, 4244354146 + ... + 4244354155.

It is an arithmetic number, because the mean of its divisors is an integer number (12733062453).

Almost surely, 2^42443541505 is an apocalyptic number.

It is an amenable number.

42443541505 is a deficient number, since it is larger than the sum of its proper divisors (8488708307).

42443541505 is an equidigital number, since it uses as much as digits as its factorization.

42443541505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8488708306.

The product of its (nonzero) digits is 192000, while the sum is 37.

The spelling of 42443541505 in words is "forty-two billion, four hundred forty-three million, five hundred forty-one thousand, five hundred five".