16850185161 has 4 divisors (see below), whose sum is σ = 22466913552. Its totient is φ = 11233456772.

The previous prime is 16850185109. The next prime is 16850185243. The reversal of 16850185161 is 16158105861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16158105861 = 3 ⋅5386035287.

It is a cyclic number.

It is not a de Polignac number, because 16850185161 - 2¹⁸ = 16849923017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16850186161) 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, 2808364191 + ... + 2808364196.

It is an arithmetic number, because the mean of its divisors is an integer number (5616728388).

Almost surely, 2^16850185161 is an apocalyptic number.

It is an amenable number.

16850185161 is a deficient number, since it is larger than the sum of its proper divisors (5616728391).

16850185161 is an equidigital number, since it uses as much as digits as its factorization.

16850185161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5616728390.

The product of its (nonzero) digits is 57600, while the sum is 42.

The spelling of 16850185161 in words is "sixteen billion, eight hundred fifty million, one hundred eighty-five thousand, one hundred sixty-one".