9959621224 has 192 divisors, whose sum is σ = 24403368960. Its totient is φ = 3779758080.

The previous prime is 9959621197. The next prime is 9959621279. The reversal of 9959621224 is 4221269599.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7642957 + ... + 7644259.

It is an arithmetic number, because the mean of its divisors is an integer number (127100880).

Almost surely, 2^9959621224 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 9959621224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12201684480).

9959621224 is an abundant number, since it is smaller than the sum of its proper divisors (14443747736).

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

9959621224 is a wasteful number, since it uses less digits than its factorization.

9959621224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408 (or 1397 counting only the distinct ones).

The product of its digits is 699840, while the sum is 49.

The square root of 9959621224 is about 99797.9019017935. The cubic root of 9959621224 is about 2151.5309970738.

The spelling of 9959621224 in words is "nine billion, nine hundred fifty-nine million, six hundred twenty-one thousand, two hundred twenty-four".