16591684391101 has 4 divisors (see below), whose sum is σ = 17163811439100. Its totient is φ = 16019557343104.

The previous prime is 16591684391041. The next prime is 16591684391171. The reversal of 16591684391101 is 10119348619561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3034044906201 + 13557639484900 = 1741851^2 + 3682070^2 .

It is a cyclic number.

It is not a de Polignac number, because 16591684391101 - 2¹³ = 16591684382909 is a prime.

It is a super-2 number, since 2×16591684391101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16591684391171) 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 3 ways as a sum of consecutive naturals, for example, 286063523956 + ... + 286063524013.

It is an arithmetic number, because the mean of its divisors is an integer number (4290952859775).

Almost surely, 2^{16591684391101} is an apocalyptic number.

It is an amenable number.

16591684391101 is a deficient number, since it is larger than the sum of its proper divisors (572127047999).

16591684391101 is an equidigital number, since it uses as much as digits as its factorization.

16591684391101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572127047998.

The product of its (nonzero) digits is 1399680, while the sum is 55.

The spelling of 16591684391101 in words is "sixteen trillion, five hundred ninety-one billion, six hundred eighty-four million, three hundred ninety-one thousand, one hundred one".