9772222645920 has 768 divisors, whose sum is σ = 37866104156160. Its totient is φ = 2068933902336.

The previous prime is 9772222645919. The next prime is 9772222645943. The reversal of 9772222645920 is 295462222779.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 513966334 + ... + 513985346.

It is an arithmetic number, because the mean of its divisors is an integer number (49304823120).

Almost surely, 2^{9772222645920} 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 9772222645920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18933052078080).

9772222645920 is an abundant number, since it is smaller than the sum of its proper divisors (28093881510240).

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

9772222645920 is a wasteful number, since it uses less digits than its factorization.

9772222645920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19237 (or 19229 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 57.

The spelling of 9772222645920 in words is "nine trillion, seven hundred seventy-two billion, two hundred twenty-two million, six hundred forty-five thousand, nine hundred twenty".