14423628781 has 4 divisors (see below), whose sum is σ = 14445450364. Its totient is φ = 14401807200.

The previous prime is 14423628763. The next prime is 14423628787. The reversal of 14423628781 is 18782632441.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10643223556 + 3780405225 = 103166^2 + 61485^2 .

It is a cyclic number.

It is not a de Polignac number, because 14423628781 - 2³³ = 5833694189 is a prime.

It is a super-2 number, since 2×14423628781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14423628787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10909800 + ... + 10911121.

It is an arithmetic number, because the mean of its divisors is an integer number (3611362591).

Almost surely, 2^14423628781 is an apocalyptic number.

It is an amenable number.

14423628781 is a deficient number, since it is larger than the sum of its proper divisors (21821583).

14423628781 is an equidigital number, since it uses as much as digits as its factorization.

14423628781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21821582.

The product of its digits is 516096, while the sum is 46.

It can be divided in two parts, 14423 and 628781, that added together give a square (643204 = 802²).

The spelling of 14423628781 in words is "fourteen billion, four hundred twenty-three million, six hundred twenty-eight thousand, seven hundred eighty-one".