8447991552 has 1080 divisors, whose sum is σ = 34999313888. Its totient is φ = 1970749440.

The previous prime is 8447991529. The next prime is 8447991557. The reversal of 8447991552 is 2551997448.

It is a happy number.

8447991552 is a `hidden beast` number, since 84 + 4 + 7 + 9 + 9 + 1 + 552 = 666.

It is a super-2 number, since 2×8447991552² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8447991557) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 228324078 + ... + 228324114.

Almost surely, 2^8447991552 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 8447991552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17499656944).

8447991552 is an abundant number, since it is smaller than the sum of its proper divisors (26551322336).

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

8447991552 is a wasteful number, since it uses less digits than its factorization.

8447991552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 73 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 8447991552 is about 91912.9563880958. The cubic root of 8447991552 is about 2036.6566689778.

It can be divided in two parts, 8447 and 991552, that added together give a palindrome (999999).

The spelling of 8447991552 in words is "eight billion, four hundred forty-seven million, nine hundred ninety-one thousand, five hundred fifty-two".