440004121001 has 6 divisors (see below), whose sum is σ = 467409222270. Its totient is φ = 414121525376.

The previous prime is 440004120961. The next prime is 440004121003. The reversal of 440004121001 is 100121400044.

It can be written as a sum of positive squares in 3 ways, for example, as 202094303401 + 237909817600 = 449549^2 + 487760^2 .

It is a de Polignac number, because none of the positive numbers 2^k-440004121001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440004121003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 761252516 + ... + 761253093.

It is an arithmetic number, because the mean of its divisors is an integer number (77901537045).

Almost surely, 2^440004121001 is an apocalyptic number.

It is an amenable number.

440004121001 is a deficient number, since it is larger than the sum of its proper divisors (27405101269).

440004121001 is a wasteful number, since it uses less digits than its factorization.

440004121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522505643 (or 1522505626 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 440004121001 its reverse (100121400044), we get a palindrome (540125521045).

The spelling of 440004121001 in words is "four hundred forty billion, four million, one hundred twenty-one thousand, one".