22774236781 has 8 divisors (see below), whose sum is σ = 23538742040. Its totient is φ = 22017572928.

The previous prime is 22774236757. The next prime is 22774236787. The reversal of 22774236781 is 18763247722.

It can be written as a sum of positive squares in 4 ways, for example, as 2299202500 + 20475034281 = 47950^2 + 143091^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22774236781 - 2¹¹ = 22774234733 is a prime.

It is a super-3 number, since 3×22774236781³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22774236787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1954446 + ... + 1966063.

It is an arithmetic number, because the mean of its divisors is an integer number (2942342755).

Almost surely, 2^22774236781 is an apocalyptic number.

It is an amenable number.

22774236781 is a deficient number, since it is larger than the sum of its proper divisors (764505259).

22774236781 is a wasteful number, since it uses less digits than its factorization.

22774236781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3920703.

The product of its digits is 1580544, while the sum is 49.

The spelling of 22774236781 in words is "twenty-two billion, seven hundred seventy-four million, two hundred thirty-six thousand, seven hundred eighty-one".