2126564161 has 2 divisors, whose sum is σ = 2126564162. Its totient is φ = 2126564160.

The previous prime is 2126564149. The next prime is 2126564243. The reversal of 2126564161 is 1614656212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2114620225 + 11943936 = 45985^2 + 3456^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126564161 - 2¹³ = 2126555969 is a prime.

It is not a weakly prime, because it can be changed into another prime (2126568161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063282080 + 1063282081.

It is an arithmetic number, because the mean of its divisors is an integer number (1063282081).

Almost surely, 2^2126564161 is an apocalyptic number.

It is an amenable number.

2126564161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126564161 is an equidigital number, since it uses as much as digits as its factorization.

2126564161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 2126564161 is about 46114.6848736929. The cubic root of 2126564161 is about 1285.9561609746.

The spelling of 2126564161 in words is "two billion, one hundred twenty-six million, five hundred sixty-four thousand, one hundred sixty-one".