26561872087 has 8 divisors (see below), whose sum is σ = 26610552752. Its totient is φ = 26513222400.

The previous prime is 26561872079. The next prime is 26561872121. The reversal of 26561872087 is 78027816562.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26561872087 - 2³ = 26561872079 is a prime.

It is a super-2 number, since 2×26561872087² (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 (26561872787) 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 7 ways as a sum of consecutive naturals, for example, 2316733 + ... + 2328169.

It is an arithmetic number, because the mean of its divisors is an integer number (3326319094).

Almost surely, 2^26561872087 is an apocalyptic number.

26561872087 is a deficient number, since it is larger than the sum of its proper divisors (48680665).

26561872087 is a wasteful number, since it uses less digits than its factorization.

26561872087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15489.

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 26561872087 in words is "twenty-six billion, five hundred sixty-one million, eight hundred seventy-two thousand, eighty-seven".