9951863472 has 200 divisors, whose sum is σ = 30968256000. Its totient is φ = 3075470208.

The previous prime is 9951863423. The next prime is 9951863479. The reversal of 9951863472 is 2743681599.

9951863472 is a `hidden beast` number, since 9 + 95 + 1 + 86 + 3 + 472 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (9951863479) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1153029 + ... + 1161627.

It is an arithmetic number, because the mean of its divisors is an integer number (154841280).

Almost surely, 2^9951863472 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 9951863472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15484128000).

9951863472 is an abundant number, since it is smaller than the sum of its proper divisors (21016392528).

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

9951863472 is a wasteful number, since it uses less digits than its factorization.

9951863472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8685 (or 8670 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 9951863472 is about 99759.0270201148. The cubic root of 9951863472 is about 2150.9722281855.

The spelling of 9951863472 in words is "nine billion, nine hundred fifty-one million, eight hundred sixty-three thousand, four hundred seventy-two".