16549278736 has 45 divisors (see below), whose sum is σ = 33237987991. Its totient is φ = 7982102912.

The previous prime is 16549278719. The next prime is 16549278763. The reversal of 16549278736 is 63787294561.

The square root of 16549278736 is 128644.

It is a perfect power (a square), and thus also a powerful number.

16549278736 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5799736336 + 10749542400 = 76156^2 + 103680^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14922150 + ... + 14923258.

Almost surely, 2^16549278736 is an apocalyptic number.

16549278736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

16549278736 is the 128644-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16549278736

16549278736 is an abundant number, since it is smaller than the sum of its proper divisors (16688709255).

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

16549278736 is an frugal number, since it uses more digits than its factorization.

16549278736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284 (or 1140 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 58.

The spelling of 16549278736 in words is "sixteen billion, five hundred forty-nine million, two hundred seventy-eight thousand, seven hundred thirty-six".