9968722785 has 64 divisors (see below), whose sum is σ = 20586063360. Its totient is φ = 4482397440.

The previous prime is 9968722783. The next prime is 9968722811. The reversal of 9968722785 is 5872278699.

It is not a de Polignac number, because 9968722785 - 2¹ = 9968722783 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (9968722783) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28822 + ... + 144111.

It is an arithmetic number, because the mean of its divisors is an integer number (321657240).

Almost surely, 2^9968722785 is an apocalyptic number.

9968722785 is the 57645-th octagonal number.

It is an amenable number.

9968722785 is an abundant number, since it is smaller than the sum of its proper divisors (10617340575).

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

9968722785 is a wasteful number, since it uses less digits than its factorization.

9968722785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173015 (or 173009 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 63.

The square root of 9968722785 is about 99843.4914503695. The cubic root of 9968722785 is about 2152.1861869360.

The spelling of 9968722785 in words is "nine billion, nine hundred sixty-eight million, seven hundred twenty-two thousand, seven hundred eighty-five".