8723216636945 has 8 divisors (see below), whose sum is σ = 10472958788136. Its totient is φ = 6975174093696.

The previous prime is 8723216636861. The next prime is 8723216636947. The reversal of 8723216636945 is 5496366123278.

It can be written as a sum of positive squares in 4 ways, for example, as 1047208382224 + 7676008254721 = 1023332^2 + 2770561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8723216636945 - 2¹⁸ = 8723216374801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8723216636947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424890692 + ... + 424911221.

It is an arithmetic number, because the mean of its divisors is an integer number (1309119848517).

Almost surely, 2^{8723216636945} is an apocalyptic number.

It is an amenable number.

8723216636945 is a deficient number, since it is larger than the sum of its proper divisors (1749742151191).

8723216636945 is a wasteful number, since it uses less digits than its factorization.

8723216636945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849803971.

The product of its digits is 78382080, while the sum is 62.

The spelling of 8723216636945 in words is "eight trillion, seven hundred twenty-three billion, two hundred sixteen million, six hundred thirty-six thousand, nine hundred forty-five".