16593561856 has 81 divisors (see below), whose sum is σ = 33875370921. Its totient is φ = 8112316416.

The previous prime is 16593561799. The next prime is 16593561871. The reversal of 16593561856 is 65816539561.

The square root of 16593561856 is 128816.

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

It can be written as a sum of positive squares in only one way, i.e., 7451142400 + 9142419456 = 86320^2 + 95616^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16593561797 and 16593561806.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 171067600 + ... + 171067696.

Almost surely, 2^16593561856 is an apocalyptic number.

16593561856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

16593561856 is the 128816-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16593561856

16593561856 is an abundant number, since it is smaller than the sum of its proper divisors (17281809065).

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

16593561856 is an frugal number, since it uses more digits than its factorization.

16593561856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 182 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 55.

The spelling of 16593561856 in words is "sixteen billion, five hundred ninety-three million, five hundred sixty-one thousand, eight hundred fifty-six".