40042423243 has 16 divisors (see below), whose sum is σ = 40931573760. Its totient is φ = 39163924800.

The previous prime is 40042423199. The next prime is 40042423279. The reversal of 40042423243 is 34232424004.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40042423243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40042429243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6382198 + ... + 6388468.

It is an arithmetic number, because the mean of its divisors is an integer number (2558223360).

Almost surely, 2^40042423243 is an apocalyptic number.

40042423243 is a deficient number, since it is larger than the sum of its proper divisors (889150517).

40042423243 is a wasteful number, since it uses less digits than its factorization.

40042423243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7098.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 40042423243 its reverse (34232424004), we get a palindrome (74274847247).

The spelling of 40042423243 in words is "forty billion, forty-two million, four hundred twenty-three thousand, two hundred forty-three".