16561067116057 has 8 divisors (see below), whose sum is σ = 16735567776872. Its totient is φ = 16386643353600.

The previous prime is 16561067116031. The next prime is 16561067116079. The reversal of 16561067116057 is 75061176016561.

It can be written as a sum of positive squares in 4 ways, for example, as 3774642808336 + 12786424307721 = 1942844^2 + 3575811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16561067116057 - 2²³ = 16561058727449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16561067115995 and 16561067116013.

It is not an unprimeable number, because it can be changed into a prime (16561067116357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18791544 + ... + 19653097.

It is an arithmetic number, because the mean of its divisors is an integer number (2091945972109).

Almost surely, 2^{16561067116057} is an apocalyptic number.

It is an amenable number.

16561067116057 is a deficient number, since it is larger than the sum of its proper divisors (174500660815).

16561067116057 is an equidigital number, since it uses as much as digits as its factorization.

16561067116057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38449179.

The product of its (nonzero) digits is 1587600, while the sum is 52.

The spelling of 16561067116057 in words is "sixteen trillion, five hundred sixty-one billion, sixty-seven million, one hundred sixteen thousand, fifty-seven".