8723216636946 has 96 divisors (see below), whose sum is σ = 21929395213440. Its totient is φ = 2454402981888.

The previous prime is 8723216636861. The next prime is 8723216636947. The reversal of 8723216636946 is 6496366123278.

8723216636946 is a `hidden beast` number, since 8 + 72 + 3 + 2 + 166 + 369 + 46 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 47 ways as a sum of consecutive naturals, for example, 27948220 + ... + 28258616.

It is an arithmetic number, because the mean of its divisors is an integer number (228431200140).

Almost surely, 2^{8723216636946} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8723216636946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10964697606720).

8723216636946 is an abundant number, since it is smaller than the sum of its proper divisors (13206178576494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8723216636946 is a wasteful number, since it uses less digits than its factorization.

8723216636946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313808 (or 313805 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 63.

The spelling of 8723216636946 in words is "eight trillion, seven hundred twenty-three billion, two hundred sixteen million, six hundred thirty-six thousand, nine hundred forty-six".