26271640105 has 4 divisors (see below), whose sum is σ = 31525968132. Its totient is φ = 21017312080.

The previous prime is 26271640079. The next prime is 26271640127. The reversal of 26271640105 is 50104617262.

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 3250254121 + 23021385984 = 57011^2 + 151728^2 .

It is not a de Polignac number, because 26271640105 - 2¹⁵ = 26271607337 is a prime.

It is a super-2 number, since 2×26271640105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2627164006 + ... + 2627164015.

It is an arithmetic number, because the mean of its divisors is an integer number (7881492033).

Almost surely, 2^26271640105 is an apocalyptic number.

It is an amenable number.

26271640105 is a deficient number, since it is larger than the sum of its proper divisors (5254328027).

26271640105 is an equidigital number, since it uses as much as digits as its factorization.

26271640105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5254328026.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 26271640105 in words is "twenty-six billion, two hundred seventy-one million, six hundred forty thousand, one hundred five".