402144444023 has 4 divisors (see below), whose sum is σ = 459593650320. Its totient is φ = 344695237728.

The previous prime is 402144444019. The next prime is 402144444047. The reversal of 402144444023 is 320444441204.

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 402144444023 - 2² = 402144444019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402144444523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28724603138 + ... + 28724603151.

It is an arithmetic number, because the mean of its divisors is an integer number (114898412580).

Almost surely, 2^402144444023 is an apocalyptic number.

402144444023 is a deficient number, since it is larger than the sum of its proper divisors (57449206297).

402144444023 is an equidigital number, since it uses as much as digits as its factorization.

402144444023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57449206296.

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 402144444023 its reverse (320444441204), we get a palindrome (722588885227).

The spelling of 402144444023 in words is "four hundred two billion, one hundred forty-four million, four hundred forty-four thousand, twenty-three".