16605505988771 has 32 divisors (see below), whose sum is σ = 20039755008000. Its totient is φ = 13441521687552.

The previous prime is 16605505988767. The next prime is 16605505988839. The reversal of 16605505988771 is 17788950550661.

It is not a de Polignac number, because 16605505988771 - 2² = 16605505988767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16605505988371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247333535 + ... + 247400663.

It is an arithmetic number, because the mean of its divisors is an integer number (626242344000).

Almost surely, 2^{16605505988771} is an apocalyptic number.

16605505988771 is a deficient number, since it is larger than the sum of its proper divisors (3434249019229).

16605505988771 is a wasteful number, since it uses less digits than its factorization.

16605505988771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73011.

The product of its (nonzero) digits is 127008000, while the sum is 68.

The spelling of 16605505988771 in words is "sixteen trillion, six hundred five billion, five hundred five million, nine hundred eighty-eight thousand, seven hundred seventy-one".