26806242049 has 4 divisors (see below), whose sum is σ = 26903015764. Its totient is φ = 26709468336.

The previous prime is 26806242019. The next prime is 26806242061. The reversal of 26806242049 is 94024260862.

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 2553786225 + 24252455824 = 50535^2 + 155732^2 .

It is a cyclic number.

It is not a de Polignac number, because 26806242049 - 2⁹ = 26806241537 is a prime.

It is a super-2 number, since 2×26806242049² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26806241996 and 26806242014.

It is not an unprimeable number, because it can be changed into a prime (26806242019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48386442 + ... + 48386995.

It is an arithmetic number, because the mean of its divisors is an integer number (6725753941).

Almost surely, 2^26806242049 is an apocalyptic number.

It is an amenable number.

26806242049 is a deficient number, since it is larger than the sum of its proper divisors (96773715).

26806242049 is an equidigital number, since it uses as much as digits as its factorization.

26806242049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96773714.

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 26806242049 in words is "twenty-six billion, eight hundred six million, two hundred forty-two thousand, forty-nine".