26517542863 has 4 divisors (see below), whose sum is σ = 30305763280. Its totient is φ = 22729322448.

The previous prime is 26517542851. The next prime is 26517542893. The reversal of 26517542863 is 36824571562.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-26517542863 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 (26517542893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894110198 + ... + 1894110211.

It is an arithmetic number, because the mean of its divisors is an integer number (7576440820).

Almost surely, 2^26517542863 is an apocalyptic number.

26517542863 is a deficient number, since it is larger than the sum of its proper divisors (3788220417).

26517542863 is an equidigital number, since it uses as much as digits as its factorization.

26517542863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3788220416.

The product of its digits is 2419200, while the sum is 49.

The spelling of 26517542863 in words is "twenty-six billion, five hundred seventeen million, five hundred forty-two thousand, eight hundred sixty-three".