444813667129 has 4 divisors (see below), whose sum is σ = 479030103076. Its totient is φ = 410597231184.

The previous prime is 444813667063. The next prime is 444813667139. The reversal of 444813667129 is 921766318444.

It is a happy number.

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 157358989225 + 287454677904 = 396685^2 + 536148^2 .

It is a cyclic number.

It is not a de Polignac number, because 444813667129 - 2¹⁹ = 444813142841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 444813667129.

It is not an unprimeable number, because it can be changed into a prime (444813667139) 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, 17108217954 + ... + 17108217979.

It is an arithmetic number, because the mean of its divisors is an integer number (119757525769).

Almost surely, 2^444813667129 is an apocalyptic number.

It is an amenable number.

444813667129 is a deficient number, since it is larger than the sum of its proper divisors (34216435947).

444813667129 is a wasteful number, since it uses less digits than its factorization.

444813667129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34216435946.

The product of its digits is 6967296, while the sum is 55.

The spelling of 444813667129 in words is "four hundred forty-four billion, eight hundred thirteen million, six hundred sixty-seven thousand, one hundred twenty-nine".