22533742561 has 4 divisors (see below), whose sum is σ = 24582264624. Its totient is φ = 20485220500.

The previous prime is 22533742549. The next prime is 22533742633. The reversal of 22533742561 is 16524733522.

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 22533742561 - 2⁵ = 22533742529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22533742961) 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, 1024261015 + ... + 1024261036.

It is an arithmetic number, because the mean of its divisors is an integer number (6145566156).

Almost surely, 2^22533742561 is an apocalyptic number.

It is an amenable number.

22533742561 is a deficient number, since it is larger than the sum of its proper divisors (2048522063).

22533742561 is a wasteful number, since it uses less digits than its factorization.

22533742561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048522062.

The product of its digits is 302400, while the sum is 40.

The spelling of 22533742561 in words is "twenty-two billion, five hundred thirty-three million, seven hundred forty-two thousand, five hundred sixty-one".