40042042043 has 4 divisors (see below), whose sum is σ = 42149517960. Its totient is φ = 37934566128.

The previous prime is 40042042039. The next prime is 40042042049. The reversal of 40042042043 is 34024024004.

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

It is not a de Polignac number, because 40042042043 - 2² = 40042042039 is a prime.

It is a super-2 number, since 2×40042042043² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40042042049) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1053737930 + ... + 1053737967.

It is an arithmetic number, because the mean of its divisors is an integer number (10537379490).

Almost surely, 2^40042042043 is an apocalyptic number.

40042042043 is a deficient number, since it is larger than the sum of its proper divisors (2107475917).

40042042043 is a wasteful number, since it uses less digits than its factorization.

40042042043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107475916.

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 40042042043 its reverse (34024024004), we get a palindrome (74066066047).

The spelling of 40042042043 in words is "forty billion, forty-two million, forty-two thousand, forty-three".