8644319764321 has 4 divisors (see below), whose sum is σ = 8651602258992. Its totient is φ = 8637037269652.

The previous prime is 8644319764303. The next prime is 8644319764439. The reversal of 8644319764321 is 1234679134468.

It is a happy number.

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 8644319764321 - 2¹⁷ = 8644319633249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8644319764121) 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, 3641245555 + ... + 3641247928.

It is an arithmetic number, because the mean of its divisors is an integer number (2162900564748).

Almost surely, 2^{8644319764321} is an apocalyptic number.

It is an amenable number.

8644319764321 is a deficient number, since it is larger than the sum of its proper divisors (7282494671).

8644319764321 is a wasteful number, since it uses less digits than its factorization.

8644319764321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7282494670.

The product of its digits is 20901888, while the sum is 58.

The spelling of 8644319764321 in words is "eight trillion, six hundred forty-four billion, three hundred nineteen million, seven hundred sixty-four thousand, three hundred twenty-one".