40021440401 has 16 divisors (see below), whose sum is σ = 42199185600. Its totient is φ = 37897449408.

The previous prime is 40021440391. The next prime is 40021440427. The reversal of 40021440401 is 10404412004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40021440401 - 2¹⁰ = 40021439377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40021440101) 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, 7773110 + ... + 7778256.

It is an arithmetic number, because the mean of its divisors is an integer number (2637449100).

Almost surely, 2^40021440401 is an apocalyptic number.

It is an amenable number.

40021440401 is a deficient number, since it is larger than the sum of its proper divisors (2177745199).

40021440401 is a wasteful number, since it uses less digits than its factorization.

40021440401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10288.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 40021440401 its reverse (10404412004), we get a palindrome (50425852405).

The spelling of 40021440401 in words is "forty billion, twenty-one million, four hundred forty thousand, four hundred one".