16520849280 has 768 divisors, whose sum is σ = 64758657600. Its totient is φ = 3853910016.

The previous prime is 16520849269. The next prime is 16520849299. The reversal of 16520849280 is 8294802561.

16520849280 is a `hidden beast` number, since 1 + 6 + 520 + 8 + 49 + 2 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 185627476 + ... + 185627564.

Almost surely, 2^16520849280 is an apocalyptic number.

16520849280 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 16520849280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32379328800).

16520849280 is an abundant number, since it is smaller than the sum of its proper divisors (48237808320).

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

16520849280 is a wasteful number, since it uses less digits than its factorization.

16520849280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 16520849280 in words is "sixteen billion, five hundred twenty million, eight hundred forty-nine thousand, two hundred eighty".