9999255552 has 384 divisors, whose sum is σ = 33022080000. Its totient is φ = 2645360640.

The previous prime is 9999255527. The next prime is 9999255557. The reversal of 9999255552 is 2555529999.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×9999255552² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9999255557) 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, 16692949 + ... + 16693547.

It is an arithmetic number, because the mean of its divisors is an integer number (85995000).

Almost surely, 2^9999255552 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 9999255552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16511040000).

9999255552 is an abundant number, since it is smaller than the sum of its proper divisors (23022824448).

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

9999255552 is a wasteful number, since it uses less digits than its factorization.

9999255552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 647 counting only the distinct ones).

The product of its digits is 16402500, while the sum is 60.

The square root of 9999255552 is about 99996.2776907221. The cubic root of 9999255552 is about 2154.3812265520.

The spelling of 9999255552 in words is "nine billion, nine hundred ninety-nine million, two hundred fifty-five thousand, five hundred fifty-two".