22154567609 has 2 divisors, whose sum is σ = 22154567610. Its totient is φ = 22154567608.

The previous prime is 22154567599. The next prime is 22154567627. The reversal of 22154567609 is 90676545122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22129537600 + 25030009 = 148760^2 + 5003^2 .

It is a cyclic number.

It is not a de Polignac number, because 22154567609 - 2⁴ = 22154567593 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22154567639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077283804 + 11077283805.

It is an arithmetic number, because the mean of its divisors is an integer number (11077283805).

Almost surely, 2^22154567609 is an apocalyptic number.

It is an amenable number.

22154567609 is a deficient number, since it is larger than the sum of its proper divisors (1).

22154567609 is an equidigital number, since it uses as much as digits as its factorization.

22154567609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 22154567609 in words is "twenty-two billion, one hundred fifty-four million, five hundred sixty-seven thousand, six hundred nine".