22561661263445 has 16 divisors (see below), whose sum is σ = 27086343598080. Its totient is φ = 18041097216000.

The previous prime is 22561661263369. The next prime is 22561661263459. The reversal of 22561661263445 is 54436216616522.

It is a de Polignac number, because none of the positive numbers 2^k-22561661263445 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119691020 + ... + 119879370.

It is an arithmetic number, because the mean of its divisors is an integer number (1692896474880).

Almost surely, 2^{22561661263445} is an apocalyptic number.

It is an amenable number.

22561661263445 is a deficient number, since it is larger than the sum of its proper divisors (4524682334635).

22561661263445 is a wasteful number, since it uses less digits than its factorization.

22561661263445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199156.

The product of its digits is 12441600, while the sum is 53.

Adding to 22561661263445 its reverse (54436216616522), we get a palindrome (76997877879967).

The spelling of 22561661263445 in words is "twenty-two trillion, five hundred sixty-one billion, six hundred sixty-one million, two hundred sixty-three thousand, four hundred forty-five".