26749427605 has 4 divisors (see below), whose sum is σ = 32099313132. Its totient is φ = 21399542080.

The previous prime is 26749427587. The next prime is 26749427629. The reversal of 26749427605 is 50672494762.

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 8234110564 + 18515317041 = 90742^2 + 136071^2 .

It is not a de Polignac number, because 26749427605 - 2³¹ = 24601943957 is a prime.

It is a Duffinian number.

It is a congruent 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, 2674942756 + ... + 2674942765.

It is an arithmetic number, because the mean of its divisors is an integer number (8024828283).

Almost surely, 2^26749427605 is an apocalyptic number.

It is an amenable number.

26749427605 is a deficient number, since it is larger than the sum of its proper divisors (5349885527).

26749427605 is an equidigital number, since it uses as much as digits as its factorization.

26749427605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5349885526.

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 26749427605 in words is "twenty-six billion, seven hundred forty-nine million, four hundred twenty-seven thousand, six hundred five".