400144411243421 has 8 divisors (see below), whose sum is σ = 430995708130680. Its totient is φ = 369303251150592.

The previous prime is 400144411243361. The next prime is 400144411243453. The reversal of 400144411243421 is 124342114441004.

It can be written as a sum of positive squares in 4 ways, for example, as 203676111852196 + 196468299391225 = 14271514^2 + 14016715^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400144411243421 - 2³⁰ = 400143337501597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400144411243721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2534116616 + ... + 2534274513.

It is an arithmetic number, because the mean of its divisors is an integer number (53874463516335).

Almost surely, 2^{400144411243421} is an apocalyptic number.

It is an amenable number.

400144411243421 is a deficient number, since it is larger than the sum of its proper divisors (30851296887259).

400144411243421 is a wasteful number, since it uses less digits than its factorization.

400144411243421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5068397215.

The product of its (nonzero) digits is 49152, while the sum is 35.

Adding to 400144411243421 its reverse (124342114441004), we get a palindrome (524486525684425).

The spelling of 400144411243421 in words is "four hundred trillion, one hundred forty-four billion, four hundred eleven million, two hundred forty-three thousand, four hundred twenty-one".