16726777320 has 128 divisors (see below), whose sum is σ = 55026656640. Its totient is φ = 4033904640.

The previous prime is 16726777307. The next prime is 16726777321. The reversal of 16726777320 is 2377762761.

It is a self number, because there is not a number n which added to its sum of digits gives 16726777320.

It is not an unprimeable number, because it can be changed into a prime (16726777321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221932 + ... + 287588.

It is an arithmetic number, because the mean of its divisors is an integer number (429895755).

Almost surely, 2^16726777320 is an apocalyptic number.

16726777320 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 16726777320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27513328320).

16726777320 is an abundant number, since it is smaller than the sum of its proper divisors (38299879320).

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

16726777320 is a wasteful number, since it uses less digits than its factorization.

16726777320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65875 (or 65871 counting only the distinct ones).

The product of its (nonzero) digits is 1037232, while the sum is 48.

The spelling of 16726777320 in words is "sixteen billion, seven hundred twenty-six million, seven hundred seventy-seven thousand, three hundred twenty".