26291426405 has 8 divisors (see below), whose sum is σ = 31553055384. Its totient is φ = 21030912000.

The previous prime is 26291426393. The next prime is 26291426407. The reversal of 26291426405 is 50462419262.

It can be written as a sum of positive squares in 4 ways, for example, as 14775131809 + 11516294596 = 121553^2 + 107314^2 .

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

It is not a de Polignac number, because 26291426405 - 2²⁰ = 26290377829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26291426407) 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, 225836 + ... + 321845.

It is an arithmetic number, because the mean of its divisors is an integer number (3944131923).

Almost surely, 2^26291426405 is an apocalyptic number.

It is an amenable number.

26291426405 is a deficient number, since it is larger than the sum of its proper divisors (5261628979).

26291426405 is an equidigital number, since it uses as much as digits as its factorization.

26291426405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557287.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 26291426405 in words is "twenty-six billion, two hundred ninety-one million, four hundred twenty-six thousand, four hundred five".