40044004513 has 4 divisors (see below), whose sum is σ = 40044432148. Its totient is φ = 40043576880.

The previous prime is 40044004501. The next prime is 40044004589. The reversal of 40044004513 is 31540044004.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 36015309729 + 4028694784 = 189777^2 + 63472^2 .

It is a cyclic number.

It is not a de Polignac number, because 40044004513 - 2³³ = 31454069921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40044004213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6078 + ... + 283063.

It is an arithmetic number, because the mean of its divisors is an integer number (10011108037).

Almost surely, 2^40044004513 is an apocalyptic number.

It is an amenable number.

40044004513 is a deficient number, since it is larger than the sum of its proper divisors (427635).

40044004513 is a wasteful number, since it uses less digits than its factorization.

40044004513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427634.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 40044004513 its reverse (31540044004), we get a palindrome (71584048517).

The spelling of 40044004513 in words is "forty billion, forty-four million, four thousand, five hundred thirteen".