9961718250 has 192 divisors, whose sum is σ = 28219935744. Its totient is φ = 2336400000.

The previous prime is 9961718231. The next prime is 9961718257. The reversal of 9961718250 is 528171699.

It is a self number, because there is not a number n which added to its sum of digits gives 9961718250.

It is not an unprimeable number, because it can be changed into a prime (9961718257) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2811480 + ... + 2815020.

It is an arithmetic number, because the mean of its divisors is an integer number (146978832).

Almost surely, 2^9961718250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9961718250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14109967872).

9961718250 is an abundant number, since it is smaller than the sum of its proper divisors (18258217494).

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

9961718250 is a wasteful number, since it uses less digits than its factorization.

9961718250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3614 (or 3593 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 48.

The square root of 9961718250 is about 99808.4077119758. The cubic root of 9961718250 is about 2151.6819900924.

The spelling of 9961718250 in words is "nine billion, nine hundred sixty-one million, seven hundred eighteen thousand, two hundred fifty".