40045340443 has 4 divisors (see below), whose sum is σ = 42152989960. Its totient is φ = 37937690928.

The previous prime is 40045340431. The next prime is 40045340453. The reversal of 40045340443 is 34404354004.

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

It is a cyclic number.

It is not a de Polignac number, because 40045340443 - 2²¹ = 40043243291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40045340453) 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 3 ways as a sum of consecutive naturals, for example, 1053824730 + ... + 1053824767.

It is an arithmetic number, because the mean of its divisors is an integer number (10538247490).

Almost surely, 2^40045340443 is an apocalyptic number.

40045340443 is a deficient number, since it is larger than the sum of its proper divisors (2107649517).

40045340443 is a wasteful number, since it uses less digits than its factorization.

40045340443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107649516.

The product of its (nonzero) digits is 46080, while the sum is 31.

Adding to 40045340443 its reverse (34404354004), we get a palindrome (74449694447).

It can be divided in two parts, 400453 and 40443, that added together give a square (440896 = 664²).

The spelling of 40045340443 in words is "forty billion, forty-five million, three hundred forty thousand, four hundred forty-three".