12776685156 has 27 divisors (see below), whose sum is σ = 32298335251. Its totient is φ = 4258668984.

The previous prime is 12776685139. The next prime is 12776685191. The reversal of 12776685156 is 65158667721.

It is a happy number.

The square root of 12776685156 is 113034.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 668785 + ... + 687623.

Almost surely, 2^12776685156 is an apocalyptic number.

12776685156 is the 113034-th square number.

It is an amenable number.

12776685156 is an abundant number, since it is smaller than the sum of its proper divisors (19521650095).

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

12776685156 is an frugal number, since it uses more digits than its factorization.

12776685156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37688 (or 18844 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The spelling of 12776685156 in words is "twelve billion, seven hundred seventy-six million, six hundred eighty-five thousand, one hundred fifty-six".