12177115912 has 64 divisors (see below), whose sum is σ = 26526210480. Its totient is φ = 5189763072.

The previous prime is 12177115849. The next prime is 12177115913. The reversal of 12177115912 is 21951177121.

It can be written as a sum of positive squares in 8 ways, for example, as 7256654596 + 4920461316 = 85186^2 + 70146^2 .

It is not an unprimeable number, because it can be changed into a prime (12177115913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28728 + ... + 158680.

Almost surely, 2^12177115912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12177115912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13263105240).

12177115912 is an abundant number, since it is smaller than the sum of its proper divisors (14349094568).

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

12177115912 is a wasteful number, since it uses less digits than its factorization.

12177115912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130042 (or 130038 counting only the distinct ones).

The product of its digits is 8820, while the sum is 37.

The spelling of 12177115912 in words is "twelve billion, one hundred seventy-seven million, one hundred fifteen thousand, nine hundred twelve".