40042434443 has 16 divisors (see below), whose sum is σ = 44585445600. Its totient is φ = 35652314880.

The previous prime is 40042434401. The next prime is 40042434493. The reversal of 40042434443 is 34443424004.

It is a cyclic number.

It is not a de Polignac number, because 40042434443 - 2¹⁰ = 40042433419 is a prime.

It is a super-2 number, since 2×40042434443² (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 (40042434493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271373 + ... + 392081.

It is an arithmetic number, because the mean of its divisors is an integer number (2786590350).

Almost surely, 2^40042434443 is an apocalyptic number.

40042434443 is a deficient number, since it is larger than the sum of its proper divisors (4543011157).

40042434443 is a wasteful number, since it uses less digits than its factorization.

40042434443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121342.

The product of its (nonzero) digits is 73728, while the sum is 32.

Adding to 40042434443 its reverse (34443424004), we get a palindrome (74485858447).

The spelling of 40042434443 in words is "forty billion, forty-two million, four hundred thirty-four thousand, four hundred forty-three".