16781226161 has 8 divisors (see below), whose sum is σ = 19696883520. Its totient is φ = 13995153648.

The previous prime is 16781226157. The next prime is 16781226169. The reversal of 16781226161 is 16162218761.

16781226161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16781226161 - 2² = 16781226157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16781226169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32395931 + ... + 32396448.

It is an arithmetic number, because the mean of its divisors is an integer number (2462110440).

Almost surely, 2^16781226161 is an apocalyptic number.

It is an amenable number.

16781226161 is a deficient number, since it is larger than the sum of its proper divisors (2915657359).

16781226161 is an equidigital number, since it uses as much as digits as its factorization.

16781226161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64792423.

The product of its digits is 48384, while the sum is 41.

The spelling of 16781226161 in words is "sixteen billion, seven hundred eighty-one million, two hundred twenty-six thousand, one hundred sixty-one".