12438376776 has 288 divisors, whose sum is σ = 41223756600. Its totient is φ = 3373332480.

The previous prime is 12438376739. The next prime is 12438376781. The reversal of 12438376776 is 67767383421.

12438376776 is a `hidden beast` number, since 124 + 383 + 76 + 7 + 76 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8906451876 + 3531924900 = 94374^2 + 59430^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6240036 + ... + 6242028.

Almost surely, 2^12438376776 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 12438376776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20611878300).

12438376776 is an abundant number, since it is smaller than the sum of its proper divisors (28785379824).

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

12438376776 is a wasteful number, since it uses less digits than its factorization.

12438376776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109 (or 2095 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 54.

The spelling of 12438376776 in words is "twelve billion, four hundred thirty-eight million, three hundred seventy-six thousand, seven hundred seventy-six".