9561222528 has 256 divisors, whose sum is σ = 30104524800. Its totient is φ = 2672609280.

The previous prime is 9561222527. The next prime is 9561222551. The reversal of 9561222528 is 8252221659.

It is a self number, because there is not a number n which added to its sum of digits gives 9561222528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9561222527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6643633 + ... + 6645071.

It is an arithmetic number, because the mean of its divisors is an integer number (117595800).

Almost surely, 2^9561222528 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 9561222528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15052262400).

9561222528 is an abundant number, since it is smaller than the sum of its proper divisors (20543302272).

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

9561222528 is a wasteful number, since it uses less digits than its factorization.

9561222528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502 (or 1468 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 9561222528 is about 97781.5040178867. The cubic root of 9561222528 is about 2122.4516646989.

The spelling of 9561222528 in words is "nine billion, five hundred sixty-one million, two hundred twenty-two thousand, five hundred twenty-eight".