9221961580 has 72 divisors (see below), whose sum is σ = 20997168192. Its totient is φ = 3400690176.

The previous prime is 9221961577. The next prime is 9221961587. The reversal of 9221961580 is 851691229.

It is not an unprimeable number, because it can be changed into a prime (9221961587) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4031197 + ... + 4033483.

It is an arithmetic number, because the mean of its divisors is an integer number (291627336).

Almost surely, 2^9221961580 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 9221961580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10498584096).

9221961580 is an abundant number, since it is smaller than the sum of its proper divisors (11775206612).

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

9221961580 is a wasteful number, since it uses less digits than its factorization.

9221961580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515 (or 3500 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 9221961580 is about 96031.0448761233. The cubic root of 9221961580 is about 2097.0450942974.

The spelling of 9221961580 in words is "nine billion, two hundred twenty-one million, nine hundred sixty-one thousand, five hundred eighty".