9969126388 has 24 divisors (see below), whose sum is σ = 18800800200. Its totient is φ = 4597992960.

The previous prime is 9969126379. The next prime is 9969126439. The reversal of 9969126388 is 8836219699.

9969126388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 213218404 + 9755907984 = 14602^2 + 98772^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12288 + ... + 141736.

It is an arithmetic number, because the mean of its divisors is an integer number (783366675).

Almost surely, 2^9969126388 is an apocalyptic number.

It is an amenable number.

9969126388 is a deficient number, since it is larger than the sum of its proper divisors (8831673812).

9969126388 is a wasteful number, since it uses less digits than its factorization.

9969126388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130947 (or 130945 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 61.

The square root of 9969126388 is about 99845.5126082289. The cubic root of 9969126388 is about 2152.2152316825.

The spelling of 9969126388 in words is "nine billion, nine hundred sixty-nine million, one hundred twenty-six thousand, three hundred eighty-eight".