161226622161 has 24 divisors (see below), whose sum is σ = 259459484544. Its totient is φ = 95634099360.

The previous prime is 161226622159. The next prime is 161226622217.

161226622161 is a `hidden beast` number, since 1 + 6 + 1 + 2 + 26 + 622 + 1 + 6 + 1 = 666.

161226622161 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 161226622161 - 2¹ = 161226622159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161226622121) 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 23 ways as a sum of consecutive naturals, for example, 17320366 + ... + 17329671.

It is an arithmetic number, because the mean of its divisors is an integer number (10810811856).

Almost surely, 2^161226622161 is an apocalyptic number.

161226622161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161226622161 is a deficient number, since it is larger than the sum of its proper divisors (98232862383).

161226622161 is a wasteful number, since it uses less digits than its factorization.

161226622161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34650101 (or 34650098 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

It can be divided in two parts, 161226 and 622161, that added together give a palindrome (783387).

The spelling of 161226622161 in words is "one hundred sixty-one billion, two hundred twenty-six million, six hundred twenty-two thousand, one hundred sixty-one".