16827980161 has 4 divisors (see below), whose sum is σ = 17079144112. Its totient is φ = 16576816212.

The previous prime is 16827980149. The next prime is 16827980189. The reversal of 16827980161 is 16108972861.

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.

It is a cyclic number.

It is not a de Polignac number, because 16827980161 - 2²⁹ = 16291109249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16827980131) 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, 125581875 + ... + 125582008.

It is an arithmetic number, because the mean of its divisors is an integer number (4269786028).

Almost surely, 2^16827980161 is an apocalyptic number.

It is an amenable number.

16827980161 is a deficient number, since it is larger than the sum of its proper divisors (251163951).

16827980161 is an equidigital number, since it uses as much as digits as its factorization.

16827980161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251163950.

The product of its (nonzero) digits is 290304, while the sum is 49.

The spelling of 16827980161 in words is "sixteen billion, eight hundred twenty-seven million, nine hundred eighty thousand, one hundred sixty-one".