8311665648 has 160 divisors (see below), whose sum is σ = 25303380480. Its totient is φ = 2317777920.

The previous prime is 8311665647. The next prime is 8311665683. The reversal of 8311665648 is 8465661138.

It is a super-3 number, since 3×8311665648³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 8311665597 and 8311665606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8311665647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2462490 + ... + 2465862.

It is an arithmetic number, because the mean of its divisors is an integer number (158146128).

Almost surely, 2^8311665648 is an apocalyptic number.

8311665648 is a gapful number since it is divisible by the number (88) 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 8311665648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12651690240).

8311665648 is an abundant number, since it is smaller than the sum of its proper divisors (16991714832).

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

8311665648 is a wasteful number, since it uses less digits than its factorization.

8311665648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3767 (or 3761 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The square root of 8311665648 is about 91168.3368719645. The cubic root of 8311665648 is about 2025.6419768547.

The spelling of 8311665648 in words is "eight billion, three hundred eleven million, six hundred sixty-five thousand, six hundred forty-eight".