22686685641 has 9 divisors (see below), whose sum is σ = 32770309741. Its totient is φ = 15124155852.

The previous prime is 22686685631. The next prime is 22686685649. The reversal of 22686685641 is 14658668622.

The square root of 22686685641 is 150621.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 22686685641 - 2¹⁹ = 22686161353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22686685649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 426760 + ... + 476966.

Almost surely, 2^22686685641 is an apocalyptic number.

22686685641 is the 150621-st square number.

22686685641 is the 75311-st centered octagonal number.

It is an amenable number.

22686685641 is a deficient number, since it is larger than the sum of its proper divisors (10083624100).

22686685641 is an frugal number, since it uses more digits than its factorization.

22686685641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100420 (or 50210 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 22686685641 in words is "twenty-two billion, six hundred eighty-six million, six hundred eighty-five thousand, six hundred forty-one".