444320044021541 has 4 divisors (see below), whose sum is σ = 459641424849900. Its totient is φ = 428998663193184.

The previous prime is 444320044021519. The next prime is 444320044021559. The reversal of 444320044021541 is 145120440023444.

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 91767222589441 + 352552821432100 = 9579521^2 + 18776390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444320044021541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 444320044021495 and 444320044021504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444320044021571) 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, 7660690414136 + ... + 7660690414193.

It is an arithmetic number, because the mean of its divisors is an integer number (114910356212475).

Almost surely, 2^{444320044021541} is an apocalyptic number.

It is an amenable number.

444320044021541 is a deficient number, since it is larger than the sum of its proper divisors (15321380828359).

444320044021541 is a wasteful number, since it uses less digits than its factorization.

444320044021541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15321380828358.

The product of its (nonzero) digits is 245760, while the sum is 38.

Adding to 444320044021541 its reverse (145120440023444), we get a palindrome (589440484044985).

The spelling of 444320044021541 in words is "four hundred forty-four trillion, three hundred twenty billion, forty-four million, twenty-one thousand, five hundred forty-one".