444355440523 has 4 divisors (see below), whose sum is σ = 444365750088. Its totient is φ = 444345130960.

The previous prime is 444355440439. The next prime is 444355440547. The reversal of 444355440523 is 325044553444.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444355440523 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 444355440523.

It is not an unprimeable number, because it can be changed into a prime (444355440623) 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, 5089858 + ... + 5176423.

It is an arithmetic number, because the mean of its divisors is an integer number (111091437522).

Almost surely, 2^444355440523 is an apocalyptic number.

444355440523 is a deficient number, since it is larger than the sum of its proper divisors (10309565).

444355440523 is a wasteful number, since it uses less digits than its factorization.

444355440523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10309564.

The product of its (nonzero) digits is 2304000, while the sum is 43.

Adding to 444355440523 its reverse (325044553444), we get a palindrome (769399993967).

The spelling of 444355440523 in words is "four hundred forty-four billion, three hundred fifty-five million, four hundred forty thousand, five hundred twenty-three".