8311663944720 has 400 divisors, whose sum is σ = 29425619139840. Its totient is φ = 2173778380800.

The previous prime is 8311663944713. The next prime is 8311663944739. The reversal of 8311663944720 is 274493661138.

8311663944720 is a `hidden beast` number, since 8 + 3 + 1 + 166 + 3 + 9 + 4 + 472 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 164754700 + ... + 164805140.

Almost surely, 2^{8311663944720} is an apocalyptic number.

8311663944720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8311663944720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14712809569920).

8311663944720 is an abundant number, since it is smaller than the sum of its proper divisors (21113955195120).

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

8311663944720 is a wasteful number, since it uses less digits than its factorization.

8311663944720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50956 (or 50941 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 8311663944720 in words is "eight trillion, three hundred eleven billion, six hundred sixty-three million, nine hundred forty-four thousand, seven hundred twenty".