40120440401 has 4 divisors (see below), whose sum is σ = 40123464192. Its totient is φ = 40117416612.

The previous prime is 40120440359. The next prime is 40120440433. The reversal of 40120440401 is 10404402104.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40120440401 - 2¹⁴ = 40120424017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40120440461) 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, 1491905 + ... + 1518558.

It is an arithmetic number, because the mean of its divisors is an integer number (10030866048).

Almost surely, 2^40120440401 is an apocalyptic number.

It is an amenable number.

40120440401 is a deficient number, since it is larger than the sum of its proper divisors (3023791).

40120440401 is a wasteful number, since it uses less digits than its factorization.

40120440401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023790.

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

Adding to 40120440401 its reverse (10404402104), we get a palindrome (50524842505).

The spelling of 40120440401 in words is "forty billion, one hundred twenty million, four hundred forty thousand, four hundred one".