9222779664 has 320 divisors, whose sum is σ = 32596326400. Its totient is φ = 2437682688.

The previous prime is 9222779659. The next prime is 9222779689. The reversal of 9222779664 is 4669772229.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 9222779664.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2468742 + ... + 2472474.

It is an arithmetic number, because the mean of its divisors is an integer number (101863520).

Almost surely, 2^9222779664 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 9222779664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16298163200).

9222779664 is an abundant number, since it is smaller than the sum of its proper divisors (23373546736).

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

9222779664 is a wasteful number, since it uses less digits than its factorization.

9222779664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819 (or 3807 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The square root of 9222779664 is about 96035.3042583820. The cubic root of 9222779664 is about 2097.1071023744.

The spelling of 9222779664 in words is "nine billion, two hundred twenty-two million, seven hundred seventy-nine thousand, six hundred sixty-four".