16444244461 has 4 divisors (see below), whose sum is σ = 16444669500. Its totient is φ = 16443819424.

The previous prime is 16444244429. The next prime is 16444244497.

16444244461 is nontrivially palindromic in base 10.

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 6497972100 + 9946272361 = 80610^2 + 99731^2 .

It is a cyclic number.

It is not a de Polignac number, because 16444244461 - 2⁵ = 16444244429 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 (16444244161) 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, 147946 + ... + 234043.

It is an arithmetic number, because the mean of its divisors is an integer number (4111167375).

Almost surely, 2^16444244461 is an apocalyptic number.

It is an amenable number.

16444244461 is a deficient number, since it is larger than the sum of its proper divisors (425039).

16444244461 is an equidigital number, since it uses as much as digits as its factorization.

16444244461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425038.

The product of its digits is 294912, while the sum is 40.

The spelling of 16444244461 in words is "sixteen billion, four hundred forty-four million, two hundred forty-four thousand, four hundred sixty-one".