22540520161 has 2 divisors, whose sum is σ = 22540520162. Its totient is φ = 22540520160.

The previous prime is 22540520159. The next prime is 22540520221. The reversal of 22540520161 is 16102504522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22540518225 + 1936 = 150135^2 + 44^2 .

It is a cyclic number.

It is not a de Polignac number, because 22540520161 - 2¹ = 22540520159 is a prime.

Together with 22540520159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22540520111) 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 as a sum of consecutive naturals, namely, 11270260080 + 11270260081.

It is an arithmetic number, because the mean of its divisors is an integer number (11270260081).

Almost surely, 2^22540520161 is an apocalyptic number.

It is an amenable number.

22540520161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22540520161 is an equidigital number, since it uses as much as digits as its factorization.

22540520161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 22540520161 in words is "twenty-two billion, five hundred forty million, five hundred twenty thousand, one hundred sixty-one".