26205056018065 has 32 divisors (see below), whose sum is σ = 35473824472320. Its totient is φ = 18483729479424.

The previous prime is 26205056018033. The next prime is 26205056018101. The reversal of 26205056018065 is 56081065050262.

It is a cyclic number.

It is not a de Polignac number, because 26205056018065 - 2⁵ = 26205056018033 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 161988894 + ... + 162150583.

It is an arithmetic number, because the mean of its divisors is an integer number (1108557014760).

Almost surely, 2^{26205056018065} is an apocalyptic number.

It is an amenable number.

26205056018065 is a deficient number, since it is larger than the sum of its proper divisors (9268768454255).

26205056018065 is a wasteful number, since it uses less digits than its factorization.

26205056018065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324139561.

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 26205056018065 in words is "twenty-six trillion, two hundred five billion, fifty-six million, eighteen thousand, sixty-five".