12771272808 has 128 divisors (see below), whose sum is σ = 41208672000. Its totient is φ = 3589090560.

The previous prime is 12771272803. The next prime is 12771272827. The reversal of 12771272808 is 80827217721.

It is not an unprimeable number, because it can be changed into a prime (12771272803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22998 + ... + 161466.

It is an arithmetic number, because the mean of its divisors is an integer number (321942750).

Almost surely, 2^12771272808 is an apocalyptic number.

12771272808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12771272808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20604336000).

12771272808 is an abundant number, since it is smaller than the sum of its proper divisors (28437399192).

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

12771272808 is a wasteful number, since it uses less digits than its factorization.

12771272808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138552 (or 138542 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 45.

The spelling of 12771272808 in words is "twelve billion, seven hundred seventy-one million, two hundred seventy-two thousand, eight hundred eight".