22636515561 has 24 divisors (see below), whose sum is σ = 33203056320. Its totient is φ = 13707613920.

The previous prime is 22636515557. The next prime is 22636515569. The reversal of 22636515561 is 16551563622.

It is not a de Polignac number, because 22636515561 - 2² = 22636515557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22636515569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 418455 + ... + 469443.

It is an arithmetic number, because the mean of its divisors is an integer number (1383460680).

Almost surely, 2^22636515561 is an apocalyptic number.

It is an amenable number.

22636515561 is a deficient number, since it is larger than the sum of its proper divisors (10566540759).

22636515561 is a wasteful number, since it uses less digits than its factorization.

22636515561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52237 (or 52226 counting only the distinct ones).

The product of its digits is 324000, while the sum is 42.

The spelling of 22636515561 in words is "twenty-two billion, six hundred thirty-six million, five hundred fifteen thousand, five hundred sixty-one".