9189847243872 has 192 divisors, whose sum is σ = 27477016680960. Its totient is φ = 2987043651072.

The previous prime is 9189847243817. The next prime is 9189847243901. The reversal of 9189847243872 is 2783427489819.

9189847243872 is a `hidden beast` number, since 9 + 1 + 89 + 8 + 47 + 2 + 438 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 9189847243872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6848493 + ... + 8079699.

It is an arithmetic number, because the mean of its divisors is an integer number (143109461880).

Almost surely, 2^{9189847243872} 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 9189847243872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13738508340480).

9189847243872 is an abundant number, since it is smaller than the sum of its proper divisors (18287169437088).

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

9189847243872 is a wasteful number, since it uses less digits than its factorization.

9189847243872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231442 (or 1231428 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 72.

The spelling of 9189847243872 in words is "nine trillion, one hundred eighty-nine billion, eight hundred forty-seven million, two hundred forty-three thousand, eight hundred seventy-two".