26556258005 has 4 divisors (see below), whose sum is σ = 31867509612. Its totient is φ = 21245006400.

The previous prime is 26556257977. The next prime is 26556258007. The reversal of 26556258005 is 50085265562.

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 13555013476 + 13001244529 = 116426^2 + 114023^2 .

It is not a de Polignac number, because 26556258005 - 2¹² = 26556253909 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 (26556258007) 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, 2655625796 + ... + 2655625805.

It is an arithmetic number, because the mean of its divisors is an integer number (7966877403).

Almost surely, 2^26556258005 is an apocalyptic number.

It is an amenable number.

26556258005 is a deficient number, since it is larger than the sum of its proper divisors (5311251607).

26556258005 is an equidigital number, since it uses as much as digits as its factorization.

26556258005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5311251606.

The product of its (nonzero) digits is 720000, while the sum is 44.

The spelling of 26556258005 in words is "twenty-six billion, five hundred fifty-six million, two hundred fifty-eight thousand, five".