16108832443561 has 135 divisors (see below), whose sum is σ = 20538312992547. Its totient is φ = 12622551701760.

The previous prime is 16108832443553. The next prime is 16108832443597. The reversal of 16108832443561 is 16534423880161.

The square root of 16108832443561 is 4013581.

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

It can be written as a sum of positive squares in 7 ways, for example, as 14705422605225 + 1403409838336 = 3834765^2 + 1184656^2 .

It is not a de Polignac number, because 16108832443561 - 2³ = 16108832443553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16108832443499 and 16108832443508.

It is not an unprimeable number, because it can be changed into a prime (16108832441561) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 126841200280 + ... + 126841200406.

Almost surely, 2^{16108832443561} is an apocalyptic number.

16108832443561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16108832443561 is the 4013581-st square number.

16108832443561 is the 2006791-st centered octagonal number.

It is an amenable number.

16108832443561 is a deficient number, since it is larger than the sum of its proper divisors (4429480548986).

16108832443561 is an frugal number, since it uses more digits than its factorization.

16108832443561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 16108832443561 in words is "sixteen trillion, one hundred eight billion, eight hundred thirty-two million, four hundred forty-three thousand, five hundred sixty-one".