9989299656 has 96 divisors (see below), whose sum is σ = 31502727360. Its totient is φ = 2800227456.

The previous prime is 9989299613. The next prime is 9989299669. The reversal of 9989299656 is 6569929899.

It is a super-2 number, since 2×9989299656² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 160270 + ... + 213693.

It is an arithmetic number, because the mean of its divisors is an integer number (328153410).

Almost surely, 2^9989299656 is an apocalyptic number.

9989299656 is the 53424-th nonagonal number.

It is an amenable number.

9989299656 is an abundant number, since it is smaller than the sum of its proper divisors (21513427704).

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

9989299656 is a wasteful number, since it uses less digits than its factorization.

9989299656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374035 (or 374028 counting only the distinct ones).

The product of its digits is 170061120, while the sum is 72.

The square root of 9989299656 is about 99946.4839601674. The cubic root of 9989299656 is about 2153.6659760396.

The spelling of 9989299656 in words is "nine billion, nine hundred eighty-nine million, two hundred ninety-nine thousand, six hundred fifty-six".