16491339789120 has 3584 divisors, whose sum is σ = 74860830720000. Its totient is φ = 3447431995392.

The previous prime is 16491339789103. The next prime is 16491339789151. The reversal of 16491339789120 is 2198793319461.

16491339789120 is a `hidden beast` number, since 1 + 6 + 49 + 1 + 3 + 397 + 89 + 120 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 160110094989 + ... + 160110095091.

Almost surely, 2^{16491339789120} is an apocalyptic number.

16491339789120 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 16491339789120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37430415360000).

16491339789120 is an abundant number, since it is smaller than the sum of its proper divisors (58369490930880).

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

16491339789120 is an equidigital number, since it uses as much as digits as its factorization.

16491339789120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 63.

The spelling of 16491339789120 in words is "sixteen trillion, four hundred ninety-one billion, three hundred thirty-nine million, seven hundred eighty-nine thousand, one hundred twenty".