26865517855 has 16 divisors (see below), whose sum is σ = 35987301504. Its totient is φ = 19084171680.

The previous prime is 26865517831. The next prime is 26865517867. The reversal of 26865517855 is 55871556862.

It is not a de Polignac number, because 26865517855 - 2¹³ = 26865509663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26865517855.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5677449 + ... + 5682178.

It is an arithmetic number, because the mean of its divisors is an integer number (2249206344).

Almost surely, 2^26865517855 is an apocalyptic number.

26865517855 is a deficient number, since it is larger than the sum of its proper divisors (9121783649).

26865517855 is a wasteful number, since it uses less digits than its factorization.

26865517855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11359686.

The product of its digits is 20160000, while the sum is 58.

The spelling of 26865517855 in words is "twenty-six billion, eight hundred sixty-five million, five hundred seventeen thousand, eight hundred fifty-five".