16528978272 has 96 divisors (see below), whose sum is σ = 45282797280. Its totient is φ = 5272494080.

The previous prime is 16528978247. The next prime is 16528978309. The reversal of 16528978272 is 27287982561.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288322 + ... + 340862.

It is an arithmetic number, because the mean of its divisors is an integer number (471695805).

Almost surely, 2^16528978272 is an apocalyptic number.

16528978272 is a gapful number since it is divisible by the number (12) 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 16528978272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22641398640).

16528978272 is an abundant number, since it is smaller than the sum of its proper divisors (28753819008).

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

16528978272 is a wasteful number, since it uses less digits than its factorization.

16528978272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52696 (or 52688 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 57.

The spelling of 16528978272 in words is "sixteen billion, five hundred twenty-eight million, nine hundred seventy-eight thousand, two hundred seventy-two".