402144444444443 has 4 divisors (see below), whose sum is σ = 402146125882488. Its totient is φ = 402142763006400.

The previous prime is 402144444444373. The next prime is 402144444444481. The reversal of 402144444444443 is 344444444441204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402144444444443 - 2⁸ = 402144444444187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402144444444391 and 402144444444400.

It is not an unprimeable number, because it can be changed into a prime (402144444440443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840360221 + ... + 840838622.

It is an arithmetic number, because the mean of its divisors is an integer number (100536531470622).

Almost surely, 2^{402144444444443} is an apocalyptic number.

402144444444443 is a deficient number, since it is larger than the sum of its proper divisors (1681438045).

402144444444443 is a wasteful number, since it uses less digits than its factorization.

402144444444443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681438044.

The product of its (nonzero) digits is 25165824, while the sum is 50.

Adding to 402144444444443 its reverse (344444444441204), we get a palindrome (746588888885647).

The spelling of 402144444444443 in words is "four hundred two trillion, one hundred forty-four billion, four hundred forty-four million, four hundred forty-four thousand, four hundred forty-three".