26721469221289 has 8 divisors (see below), whose sum is σ = 26997051158280. Its totient is φ = 26445889383936.

The previous prime is 26721469221253. The next prime is 26721469221319. The reversal of 26721469221289 is 98212296412762.

It can be written as a sum of positive squares in 4 ways, for example, as 3727957747264 + 22993511474025 = 1930792^2 + 4795155^2 .

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 26721469221289 - 2¹⁵ = 26721469188521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26721469221229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50642067 + ... + 51166999.

It is an arithmetic number, because the mean of its divisors is an integer number (3374631394785).

Almost surely, 2^{26721469221289} is an apocalyptic number.

It is an amenable number.

26721469221289 is a deficient number, since it is larger than the sum of its proper divisors (275581936991).

26721469221289 is an equidigital number, since it uses as much as digits as its factorization.

26721469221289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049819.

The product of its digits is 20901888, while the sum is 61.

The spelling of 26721469221289 in words is "twenty-six trillion, seven hundred twenty-one billion, four hundred sixty-nine million, two hundred twenty-one thousand, two hundred eighty-nine".