26791228209 has 16 divisors (see below), whose sum is σ = 36191467520. Its totient is φ = 17626124880.

The previous prime is 26791228193. The next prime is 26791228229. The reversal of 26791228209 is 90282219762.

It is not a de Polignac number, because 26791228209 - 2⁴ = 26791228193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26791228229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478524 + ... + 531570.

It is an arithmetic number, because the mean of its divisors is an integer number (2261966720).

Almost surely, 2^26791228209 is an apocalyptic number.

It is an amenable number.

26791228209 is a deficient number, since it is larger than the sum of its proper divisors (9400239311).

26791228209 is a wasteful number, since it uses less digits than its factorization.

26791228209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55260.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 26791228209 in words is "twenty-six billion, seven hundred ninety-one million, two hundred twenty-eight thousand, two hundred nine".