12746776384 has 14 divisors (see below), whose sum is σ = 25294384514. Its totient is φ = 6373388160.

The previous prime is 12746776381. The next prime is 12746776417. The reversal of 12746776384 is 48367764721.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12649950784 + 96825600 = 112472^2 + 9840^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12746776381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99584127 + ... + 99584254.

It is an arithmetic number, because the mean of its divisors is an integer number (1806741751).

Almost surely, 2^12746776384 is an apocalyptic number.

It is an amenable number.

12746776384 is a deficient number, since it is larger than the sum of its proper divisors (12547608130).

12746776384 is an equidigital number, since it uses as much as digits as its factorization.

12746776384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199168393 (or 199168383 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 55.

The spelling of 12746776384 in words is "twelve billion, seven hundred forty-six million, seven hundred seventy-six thousand, three hundred eighty-four".