26561652363215 has 16 divisors (see below), whose sum is σ = 31885678682208. Its totient is φ = 21241525426176.

The previous prime is 26561652363163. The next prime is 26561652363227. The reversal of 26561652363215 is 51236325616562.

It is a cyclic number.

It is not a de Polignac number, because 26561652363215 - 2¹⁰ = 26561652362191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387823364 + ... + 387891846.

It is an arithmetic number, because the mean of its divisors is an integer number (1992854917638).

Almost surely, 2^{26561652363215} is an apocalyptic number.

26561652363215 is a deficient number, since it is larger than the sum of its proper divisors (5324026318993).

26561652363215 is a wasteful number, since it uses less digits than its factorization.

26561652363215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95818.

The product of its digits is 11664000, while the sum is 53.

Adding to 26561652363215 its reverse (51236325616562), we get a palindrome (77797977979777).

The spelling of 26561652363215 in words is "twenty-six trillion, five hundred sixty-one billion, six hundred fifty-two million, three hundred sixty-three thousand, two hundred fifteen".