16491206204928 has 2160 divisors, whose sum is σ = 64047477574080. Its totient is φ = 4047608807424.

The previous prime is 16491206204923. The next prime is 16491206204971. The reversal of 16491206204928 is 82940260219461.

16491206204928 is a `hidden beast` number, since 1 + 6 + 4 + 9 + 1 + 2 + 0 + 620 + 4 + 9 + 2 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16491206204923) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 83711706526 + ... + 83711706722.

It is an arithmetic number, because the mean of its divisors is an integer number (29651609988).

Almost surely, 2^{16491206204928} is an apocalyptic number.

16491206204928 is a gapful number since it is divisible by the number (18) 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 16491206204928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32023738787040).

16491206204928 is an abundant number, since it is smaller than the sum of its proper divisors (47556271369152).

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

16491206204928 is a wasteful number, since it uses less digits than its factorization.

16491206204928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 16491206204928 in words is "sixteen trillion, four hundred ninety-one billion, two hundred six million, two hundred four thousand, nine hundred twenty-eight".