8644450073 has 4 divisors (see below), whose sum is σ = 9879371520. Its totient is φ = 7409528628.

The previous prime is 8644450057. The next prime is 8644450093. The reversal of 8644450073 is 3700544468.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8644450073 - 2⁴ = 8644450057 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 8644450073.

It is not an unprimeable number, because it can be changed into a prime (8644450093) 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, 617460713 + ... + 617460726.

It is an arithmetic number, because the mean of its divisors is an integer number (2469842880).

Almost surely, 2^8644450073 is an apocalyptic number.

It is an amenable number.

8644450073 is a deficient number, since it is larger than the sum of its proper divisors (1234921447).

8644450073 is a wasteful number, since it uses less digits than its factorization.

8644450073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234921446.

The product of its (nonzero) digits is 322560, while the sum is 41.

The square root of 8644450073 is about 92975.5348088948. The cubic root of 8644450073 is about 2052.3233680364.

The spelling of 8644450073 in words is "eight billion, six hundred forty-four million, four hundred fifty thousand, seventy-three".