16585084177861 has 16 divisors (see below), whose sum is σ = 18202623480000. Its totient is φ = 15041029586688.

The previous prime is 16585084177813. The next prime is 16585084177889. The reversal of 16585084177861 is 16877148058561.

It is a cyclic number.

It is not a de Polignac number, because 16585084177861 - 2¹⁷ = 16585084046789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16585084177891) 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 15 ways as a sum of consecutive naturals, for example, 33462555 + ... + 33954568.

It is an arithmetic number, because the mean of its divisors is an integer number (1137663967500).

Almost surely, 2^{16585084177861} is an apocalyptic number.

It is an amenable number.

16585084177861 is a deficient number, since it is larger than the sum of its proper divisors (1617539302139).

16585084177861 is a wasteful number, since it uses less digits than its factorization.

16585084177861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67417668.

The product of its (nonzero) digits is 90316800, while the sum is 67.

The spelling of 16585084177861 in words is "sixteen trillion, five hundred eighty-five billion, eighty-four million, one hundred seventy-seven thousand, eight hundred sixty-one".