16616636573171 has 4 divisors (see below), whose sum is σ = 16617446884632. Its totient is φ = 16615826261712.

The previous prime is 16616636573153. The next prime is 16616636573209. The reversal of 16616636573171 is 17137563661661.

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

It is a cyclic number.

It is not a de Polignac number, because 16616636573171 - 2¹⁸ = 16616636311027 is a prime.

It is a super-2 number, since 2×16616636573171² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16616636573171.

It is not an unprimeable number, because it can be changed into a prime (16616636573071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405124970 + ... + 405165983.

It is an arithmetic number, because the mean of its divisors is an integer number (4154361721158).

Almost surely, 2^{16616636573171} is an apocalyptic number.

16616636573171 is a deficient number, since it is larger than the sum of its proper divisors (810311461).

16616636573171 is an equidigital number, since it uses as much as digits as its factorization.

16616636573171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810311460.

The product of its digits is 17146080, while the sum is 59.

The spelling of 16616636573171 in words is "sixteen trillion, six hundred sixteen billion, six hundred thirty-six million, five hundred seventy-three thousand, one hundred seventy-one".