22005261561 has 8 divisors (see below), whose sum is σ = 29349191520. Its totient is φ = 14665752992.

The previous prime is 22005261527. The next prime is 22005261571. The reversal of 22005261561 is 16516250022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22005261561 - 2⁹ = 22005261049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22005261571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093716 + ... + 1113653.

It is an arithmetic number, because the mean of its divisors is an integer number (3668648940).

Almost surely, 2^22005261561 is an apocalyptic number.

It is an amenable number.

22005261561 is a deficient number, since it is larger than the sum of its proper divisors (7343929959).

22005261561 is a wasteful number, since it uses less digits than its factorization.

22005261561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210695.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 22005261561 in words is "twenty-two billion, five million, two hundred sixty-one thousand, five hundred sixty-one".