16401444743 has 4 divisors (see below), whose sum is σ = 16405287408. Its totient is φ = 16397602080.

The previous prime is 16401444737. The next prime is 16401444779. The reversal of 16401444743 is 34744410461.

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 16401444743 - 2⁶ = 16401444679 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16401444697 and 16401444706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16401444643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1914923 + ... + 1923468.

It is an arithmetic number, because the mean of its divisors is an integer number (4101321852).

Almost surely, 2^16401444743 is an apocalyptic number.

16401444743 is a deficient number, since it is larger than the sum of its proper divisors (3842665).

16401444743 is an equidigital number, since it uses as much as digits as its factorization.

16401444743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3842664.

The product of its (nonzero) digits is 129024, while the sum is 38.

The spelling of 16401444743 in words is "sixteen billion, four hundred one million, four hundred forty-four thousand, seven hundred forty-three".