22164721755 has 16 divisors (see below), whose sum is σ = 38687514624. Its totient is φ = 10746531680.

The previous prime is 22164721727. The next prime is 22164721763. The reversal of 22164721755 is 55712746122.

It is not a de Polignac number, because 22164721755 - 2⁵ = 22164721723 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 67165659 + ... + 67165988.

It is an arithmetic number, because the mean of its divisors is an integer number (2417969664).

Almost surely, 2^22164721755 is an apocalyptic number.

22164721755 is a deficient number, since it is larger than the sum of its proper divisors (16522792869).

22164721755 is a wasteful number, since it uses less digits than its factorization.

22164721755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134331666.

The product of its digits is 235200, while the sum is 42.

The spelling of 22164721755 in words is "twenty-two billion, one hundred sixty-four million, seven hundred twenty-one thousand, seven hundred fifty-five".