16634423161 has 2 divisors, whose sum is σ = 16634423162. Its totient is φ = 16634423160.

The previous prime is 16634423131. The next prime is 16634423213. The reversal of 16634423161 is 16132443661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16626555136 + 7868025 = 128944^2 + 2805^2 .

It is a cyclic number.

It is not a de Polignac number, because 16634423161 - 2⁵ = 16634423129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16634423161.

It is not a weakly prime, because it can be changed into another prime (16634423131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8317211580 + 8317211581.

It is an arithmetic number, because the mean of its divisors is an integer number (8317211581).

Almost surely, 2^16634423161 is an apocalyptic number.

It is an amenable number.

16634423161 is a deficient number, since it is larger than the sum of its proper divisors (1).

16634423161 is an equidigital number, since it uses as much as digits as its factorization.

16634423161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 37.

The spelling of 16634423161 in words is "sixteen billion, six hundred thirty-four million, four hundred twenty-three thousand, one hundred sixty-one".