26056520615617 has 16 divisors (see below), whose sum is σ = 28844047060992. Its totient is φ = 23412508387840.

The previous prime is 26056520615581. The next prime is 26056520615711. The reversal of 26056520615617 is 71651602565062.

It is a cyclic number.

It is not a de Polignac number, because 26056520615617 - 2¹⁵ = 26056520582849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26056520615117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63750913 + ... + 64158334.

It is an arithmetic number, because the mean of its divisors is an integer number (1802752941312).

Almost surely, 2^{26056520615617} is an apocalyptic number.

It is an amenable number.

26056520615617 is a deficient number, since it is larger than the sum of its proper divisors (2787526445375).

26056520615617 is a wasteful number, since it uses less digits than its factorization.

26056520615617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127909808.

The product of its (nonzero) digits is 4536000, while the sum is 52.

The spelling of 26056520615617 in words is "twenty-six trillion, fifty-six billion, five hundred twenty million, six hundred fifteen thousand, six hundred seventeen".