22156555705 has 4 divisors (see below), whose sum is σ = 26587866852. Its totient is φ = 17725244560.

The previous prime is 22156555699. The next prime is 22156555769. The reversal of 22156555705 is 50755565122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3056210089 + 19100345616 = 55283^2 + 138204^2 .

It is not a de Polignac number, because 22156555705 - 2⁹ = 22156555193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215655566 + ... + 2215655575.

It is an arithmetic number, because the mean of its divisors is an integer number (6646966713).

Almost surely, 2^22156555705 is an apocalyptic number.

It is an amenable number.

22156555705 is a deficient number, since it is larger than the sum of its proper divisors (4431311147).

22156555705 is an equidigital number, since it uses as much as digits as its factorization.

22156555705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431311146.

The product of its (nonzero) digits is 525000, while the sum is 43.

The spelling of 22156555705 in words is "twenty-two billion, one hundred fifty-six million, five hundred fifty-five thousand, seven hundred five".