40541243242 has 4 divisors (see below), whose sum is σ = 60811864866. Its totient is φ = 20270621620.

The previous prime is 40541243207. The next prime is 40541243311. The reversal of 40541243242 is 24234214504.

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., 39816610681 + 724632561 = 199541^2 + 26919^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10135310809 + ... + 10135310812.

Almost surely, 2^40541243242 is an apocalyptic number.

40541243242 is a deficient number, since it is larger than the sum of its proper divisors (20270621624).

40541243242 is a wasteful number, since it uses less digits than its factorization.

40541243242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20270621623.

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 40541243242 its reverse (24234214504), we get a palindrome (64775457746).

The spelling of 40541243242 in words is "forty billion, five hundred forty-one million, two hundred forty-three thousand, two hundred forty-two".