26555966869 has 16 divisors (see below), whose sum is σ = 27394750656. Its totient is φ = 25726723200.

The previous prime is 26555966783. The next prime is 26555966881. The reversal of 26555966869 is 96866955562.

It is a cyclic number.

It is not a de Polignac number, because 26555966869 - 2¹⁵ = 26555934101 is a prime.

It is a super-2 number, since 2×26555966869² (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 (26555966069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5838054 + ... + 5842600.

It is an arithmetic number, because the mean of its divisors is an integer number (1712171916).

Almost surely, 2^26555966869 is an apocalyptic number.

It is an amenable number.

26555966869 is a deficient number, since it is larger than the sum of its proper divisors (838783787).

26555966869 is a wasteful number, since it uses less digits than its factorization.

26555966869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5556.

The product of its digits is 209952000, while the sum is 67.

The spelling of 26555966869 in words is "twenty-six billion, five hundred fifty-five million, nine hundred sixty-six thousand, eight hundred sixty-nine".