22774221725621 has 4 divisors (see below), whose sum is σ = 23086197365772. Its totient is φ = 22462246085472.

The previous prime is 22774221725597. The next prime is 22774221725627. The reversal of 22774221725621 is 12652712247722.

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 11905529292721 + 10868692432900 = 3450439^2 + 3296770^2 .

It is a cyclic number.

It is not a de Polignac number, because 22774221725621 - 2¹⁴ = 22774221709237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22774221725621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22774221725627) 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, 155987819966 + ... + 155987820111.

It is an arithmetic number, because the mean of its divisors is an integer number (5771549341443).

Almost surely, 2^{22774221725621} is an apocalyptic number.

It is an amenable number.

22774221725621 is a deficient number, since it is larger than the sum of its proper divisors (311975640151).

22774221725621 is an equidigital number, since it uses as much as digits as its factorization.

22774221725621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311975640150.

The product of its digits is 2634240, while the sum is 50.

The spelling of 22774221725621 in words is "twenty-two trillion, seven hundred seventy-four billion, two hundred twenty-one million, seven hundred twenty-five thousand, six hundred twenty-one".