16726393728 has 768 divisors, whose sum is σ = 59880038400. Its totient is φ = 4590950400.

The previous prime is 16726393727. The next prime is 16726393757. The reversal of 16726393728 is 82739362761.

16726393728 is a `hidden beast` number, since 1 + 6 + 7 + 263 + 9 + 372 + 8 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16726393727) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 201522775 + ... + 201522857.

It is an arithmetic number, because the mean of its divisors is an integer number (77968800).

Almost surely, 2^16726393728 is an apocalyptic number.

16726393728 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 16726393728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29940019200).

16726393728 is an abundant number, since it is smaller than the sum of its proper divisors (43153644672).

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

16726393728 is a wasteful number, since it uses less digits than its factorization.

16726393728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 149 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The spelling of 16726393728 in words is "sixteen billion, seven hundred twenty-six million, three hundred ninety-three thousand, seven hundred twenty-eight".