16549494560 has 96 divisors (see below), whose sum is σ = 41504046192. Its totient is φ = 6214451200.

The previous prime is 16549494541. The next prime is 16549494593. The reversal of 16549494560 is 6549494561.

It can be written as a sum of positive squares in 8 ways, for example, as 16344088336 + 205406224 = 127844^2 + 14332^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1083134 + ... + 1098306.

Almost surely, 2^16549494560 is an apocalyptic number.

16549494560 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 16549494560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20752023096).

16549494560 is an abundant number, since it is smaller than the sum of its proper divisors (24954551632).

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

16549494560 is a wasteful number, since it uses less digits than its factorization.

16549494560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15606 (or 15598 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 53.

Subtracting from 16549494560 its reverse (6549494561), we obtain a palindrome (9999999999).

The spelling of 16549494560 in words is "sixteen billion, five hundred forty-nine million, four hundred ninety-four thousand, five hundred sixty".