9678387403872 has 192 divisors, whose sum is σ = 30811928152320. Its totient is φ = 2931219993600.

The previous prime is 9678387403849. The next prime is 9678387403873. The reversal of 9678387403872 is 2783047838769.

9678387403872 is a `hidden beast` number, since 9 + 6 + 78 + 3 + 87 + 403 + 8 + 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 9678387403872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9678387403873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16930588 + ... + 17492900.

It is an arithmetic number, because the mean of its divisors is an integer number (160478792460).

Almost surely, 2^{9678387403872} 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 9678387403872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15405964076160).

9678387403872 is an abundant number, since it is smaller than the sum of its proper divisors (21133540748448).

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

9678387403872 is a wasteful number, since it uses less digits than its factorization.

9678387403872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564154 (or 564140 counting only the distinct ones).

The product of its (nonzero) digits is 682795008, while the sum is 72.

The spelling of 9678387403872 in words is "nine trillion, six hundred seventy-eight billion, three hundred eighty-seven million, four hundred three thousand, eight hundred seventy-two".