16394120478720 has 1800 divisors, whose sum is σ = 63800532379584. Its totient is φ = 4025562955776.

The previous prime is 16394120478709. The next prime is 16394120478751. The reversal of 16394120478720 is 2787402149361.

16394120478720 is a `hidden beast` number, since 1 + 6 + 3 + 94 + 12 + 0 + 478 + 72 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 159166218189 + ... + 159166218291.

Almost surely, 2^{16394120478720} is an apocalyptic number.

16394120478720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16394120478720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31900266189792).

16394120478720 is an abundant number, since it is smaller than the sum of its proper divisors (47406411900864).

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

16394120478720 is an equidigital number, since it uses as much as digits as its factorization.

16394120478720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 16394120478720 in words is "sixteen trillion, three hundred ninety-four billion, one hundred twenty million, four hundred seventy-eight thousand, seven hundred twenty".