22567638661 has 4 divisors (see below), whose sum is σ = 22657549824. Its totient is φ = 22477727500.

The previous prime is 22567638641. The next prime is 22567638679. The reversal of 22567638661 is 16683676522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22567638661 - 2¹³ = 22567630469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22567638599 and 22567638608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22567638631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44955205 + ... + 44955706.

It is an arithmetic number, because the mean of its divisors is an integer number (5664387456).

Almost surely, 2^22567638661 is an apocalyptic number.

It is an amenable number.

22567638661 is a deficient number, since it is larger than the sum of its proper divisors (89911163).

22567638661 is an equidigital number, since it uses as much as digits as its factorization.

22567638661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89911162.

The product of its digits is 4354560, while the sum is 52.

The spelling of 22567638661 in words is "twenty-two billion, five hundred sixty-seven million, six hundred thirty-eight thousand, six hundred sixty-one".