9173978681472 has 288 divisors, whose sum is σ = 29634577539840. Its totient is φ = 2720842798080.

The previous prime is 9173978681401. The next prime is 9173978681489. The reversal of 9173978681472 is 2741868793719.

9173978681472 is a `hidden beast` number, since 9 + 1 + 7 + 3 + 9 + 78 + 6 + 81 + 472 = 666.

9173978681472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (288).

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 9173978681472.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5851273 + ... + 7251575.

It is an arithmetic number, because the mean of its divisors is an integer number (102897838680).

Almost surely, 2^{9173978681472} 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 9173978681472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14817288769920).

9173978681472 is an abundant number, since it is smaller than the sum of its proper divisors (20460598858368).

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

9173978681472 is a wasteful number, since it uses less digits than its factorization.

9173978681472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400392 (or 1400366 counting only the distinct ones).

The product of its digits is 256048128, while the sum is 72.

The spelling of 9173978681472 in words is "nine trillion, one hundred seventy-three billion, nine hundred seventy-eight million, six hundred eighty-one thousand, four hundred seventy-two".