16055727705581 has 2 divisors, whose sum is σ = 16055727705582. Its totient is φ = 16055727705580.

The previous prime is 16055727705557. The next prime is 16055727705659. The reversal of 16055727705581 is 18550772755061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13063056061225 + 2992671644356 = 3614285^2 + 1729934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16055727705581 is a prime.

It is a super-2 number, since 2×16055727705581² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16055727705581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16055727705781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8027863852790 + 8027863852791.

It is an arithmetic number, because the mean of its divisors is an integer number (8027863852791).

Almost surely, 2^{16055727705581} is an apocalyptic number.

It is an amenable number.

16055727705581 is a deficient number, since it is larger than the sum of its proper divisors (1).

16055727705581 is an equidigital number, since it uses as much as digits as its factorization.

16055727705581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20580000, while the sum is 59.

The spelling of 16055727705581 in words is "sixteen trillion, fifty-five billion, seven hundred twenty-seven million, seven hundred five thousand, five hundred eighty-one".