22525678561 has 4 divisors (see below), whose sum is σ = 22663873072. Its totient is φ = 22387484052.

The previous prime is 22525678541. The next prime is 22525678577. The reversal of 22525678561 is 16587652522.

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 22525678561 - 2¹³ = 22525670369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22525678541) 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, 69097011 + ... + 69097336.

It is an arithmetic number, because the mean of its divisors is an integer number (5665968268).

Almost surely, 2^22525678561 is an apocalyptic number.

It is an amenable number.

22525678561 is a deficient number, since it is larger than the sum of its proper divisors (138194511).

22525678561 is a wasteful number, since it uses less digits than its factorization.

22525678561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138194510.

The product of its digits is 2016000, while the sum is 49.

The spelling of 22525678561 in words is "twenty-two billion, five hundred twenty-five million, six hundred seventy-eight thousand, five hundred sixty-one".