26420226849 has 9 divisors (see below), whose sum is σ = 38163254259. Its totient is φ = 17613159480.

The previous prime is 26420226793. The next prime is 26420226863. The reversal of 26420226849 is 94862202462.

The square root of 26420226849 is 162543.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 117874449 + 26302352400 = 10857^2 + 162180^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 26420226849 - 2¹⁵ = 26420194081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26420227849) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 460539 + ... + 514719.

Almost surely, 2^26420226849 is an apocalyptic number.

26420226849 is the 162543-rd square number.

26420226849 is the 81272-nd centered octagonal number.

It is an amenable number.

26420226849 is a deficient number, since it is larger than the sum of its proper divisors (11743027410).

26420226849 is an frugal number, since it uses more digits than its factorization.

26420226849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108368 (or 54184 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 26420226849 in words is "twenty-six billion, four hundred twenty million, two hundred twenty-six thousand, eight hundred forty-nine".