8471998656 has 168 divisors, whose sum is σ = 27472745664. Its totient is φ = 2567220480.

The previous prime is 8471998529. The next prime is 8471998663. The reversal of 8471998656 is 6568991748.

It is a super-2 number, since 2×8471998656² (a number of 21 digits) contains 22 as substring.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 8471998593 and 8471998602.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146311 + ... + 195833.

It is an arithmetic number, because the mean of its divisors is an integer number (163528248).

Almost surely, 2^8471998656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8471998656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13736372832).

8471998656 is an abundant number, since it is smaller than the sum of its proper divisors (19000747008).

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

8471998656 is a wasteful number, since it uses less digits than its factorization.

8471998656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49561 (or 49539 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The square root of 8471998656 is about 92043.4606911322. The cubic root of 8471998656 is about 2038.5840693562.

The spelling of 8471998656 in words is "eight billion, four hundred seventy-one million, nine hundred ninety-eight thousand, six hundred fifty-six".