22400548609 has 2 divisors, whose sum is σ = 22400548610. Its totient is φ = 22400548608.

The previous prime is 22400548607. The next prime is 22400548657. The reversal of 22400548609 is 90684500422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17754763009 + 4645785600 = 133247^2 + 68160^2 .

It is a cyclic number.

It is not a de Polignac number, because 22400548609 - 2¹ = 22400548607 is a prime.

Together with 22400548607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22400548603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11200274304 + 11200274305.

It is an arithmetic number, because the mean of its divisors is an integer number (11200274305).

Almost surely, 2^22400548609 is an apocalyptic number.

It is an amenable number.

22400548609 is a deficient number, since it is larger than the sum of its proper divisors (1).

22400548609 is an equidigital number, since it uses as much as digits as its factorization.

22400548609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 22400548609 in words is "twenty-two billion, four hundred million, five hundred forty-eight thousand, six hundred nine".