42543511442 has 4 divisors (see below), whose sum is σ = 63815267166. Its totient is φ = 21271755720.

The previous prime is 42543511403. The next prime is 42543511453. The reversal of 42543511442 is 24411534524.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 42527100841 + 16410601 = 206221^2 + 4051^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10635877859 + ... + 10635877862.

Almost surely, 2^42543511442 is an apocalyptic number.

42543511442 is a deficient number, since it is larger than the sum of its proper divisors (21271755724).

42543511442 is a wasteful number, since it uses less digits than its factorization.

42543511442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21271755723.

The product of its digits is 76800, while the sum is 35.

The spelling of 42543511442 in words is "forty-two billion, five hundred forty-three million, five hundred eleven thousand, four hundred forty-two".