22726849777921 has 4 divisors (see below), whose sum is σ = 22726873076292. Its totient is φ = 22726826479552.

The previous prime is 22726849777903. The next prime is 22726849777937. The reversal of 22726849777921 is 12977794862722.

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 1091690625600 + 21635159152321 = 1044840^2 + 4651361^2 .

It is a cyclic number.

It is not a de Polignac number, because 22726849777921 - 2⁵ = 22726849777889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22726849778921) 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 3 ways as a sum of consecutive naturals, for example, 10118980 + ... + 12159253.

It is an arithmetic number, because the mean of its divisors is an integer number (5681718269073).

Almost surely, 2^{22726849777921} is an apocalyptic number.

It is an amenable number.

22726849777921 is a deficient number, since it is larger than the sum of its proper divisors (23298371).

22726849777921 is a wasteful number, since it uses less digits than its factorization.

22726849777921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23298370.

The product of its digits is 597445632, while the sum is 73.

The spelling of 22726849777921 in words is "twenty-two trillion, seven hundred twenty-six billion, eight hundred forty-nine million, seven hundred seventy-seven thousand, nine hundred twenty-one".