9999870552 has 80 divisors (see below), whose sum is σ = 32010182160. Its totient is φ = 2857104576.

The previous prime is 9999870497. The next prime is 9999870589. The reversal of 9999870552 is 2550789999.

9999870552 is a `hidden beast` number, since 9 + 9 + 9 + 9 + 8 + 70 + 552 = 666.

It is a super-2 number, since 2×9999870552² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 9999870552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1097743 + ... + 1106814.

It is an arithmetic number, because the mean of its divisors is an integer number (400127277).

Almost surely, 2^9999870552 is an apocalyptic number.

It is an amenable number.

9999870552 is an abundant number, since it is smaller than the sum of its proper divisors (22010311608).

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

9999870552 is a wasteful number, since it uses less digits than its factorization.

9999870552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204582 (or 2204569 counting only the distinct ones).

The product of its (nonzero) digits is 18370800, while the sum is 63.

The square root of 9999870552 is about 99999.3527579054. The cubic root of 9999870552 is about 2154.4253937497.

The spelling of 9999870552 in words is "nine billion, nine hundred ninety-nine million, eight hundred seventy thousand, five hundred fifty-two".