26805105053 has 4 divisors (see below), whose sum is σ = 26818988448. Its totient is φ = 26791221660.

The previous prime is 26805105029. The next prime is 26805105071. The reversal of 26805105053 is 35050150862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35050150862 = 2 ⋅17525075431.

It is a cyclic number.

It is not a de Polignac number, because 26805105053 - 2¹⁴ = 26805088669 is a prime.

It is a super-2 number, since 2×26805105053² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26805105083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6938801 + ... + 6942662.

It is an arithmetic number, because the mean of its divisors is an integer number (6704747112).

Almost surely, 2^26805105053 is an apocalyptic number.

It is an amenable number.

26805105053 is a deficient number, since it is larger than the sum of its proper divisors (13883395).

26805105053 is a wasteful number, since it uses less digits than its factorization.

26805105053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13883394.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 26805105053 in words is "twenty-six billion, eight hundred five million, one hundred five thousand, fifty-three".