544666405 has 4 divisors (see below), whose sum is σ = 653599692. Its totient is φ = 435733120.

The previous prime is 544666403. The next prime is 544666411. The reversal of 544666405 is 504666445.

544666405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 392119204 + 152547201 = 19802^2 + 12351^2 .

It is not a de Polignac number, because 544666405 - 2¹ = 544666403 is a prime.

It is a super-2 number, since 2×544666405² = 593322985471248050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544666403) 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, 54466636 + ... + 54466645.

It is an arithmetic number, because the mean of its divisors is an integer number (163399923).

Almost surely, 2^544666405 is an apocalyptic number.

It is an amenable number.

544666405 is a deficient number, since it is larger than the sum of its proper divisors (108933287).

544666405 is a wasteful number, since it uses less digits than its factorization.

544666405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108933286.

The product of its (nonzero) digits is 345600, while the sum is 40.

The square root of 544666405 is about 23338.0891462862. The cubic root of 544666405 is about 816.6642220298.

Adding to 544666405 its sum of digits (40), we get a palindrome (544666445).

The spelling of 544666405 in words is "five hundred forty-four million, six hundred sixty-six thousand, four hundred five".