12775555806 has 64 divisors (see below), whose sum is σ = 29230924800. Its totient is φ = 3689836416.

The previous prime is 12775555799. The next prime is 12775555813. The reversal of 12775555806 is 60855557721.

It is an interprime number because it is at equal distance from previous prime (12775555799) and next prime (12775555813).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121995 + ... + 201081.

It is an arithmetic number, because the mean of its divisors is an integer number (456733200).

Almost surely, 2^12775555806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12775555806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14615462400).

12775555806 is an abundant number, since it is smaller than the sum of its proper divisors (16455368994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12775555806 is a wasteful number, since it uses less digits than its factorization.

12775555806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79233.

The product of its (nonzero) digits is 2940000, while the sum is 51.

The spelling of 12775555806 in words is "twelve billion, seven hundred seventy-five million, five hundred fifty-five thousand, eight hundred six".