12647701444 has 81 divisors (see below), whose sum is σ = 26762165703. Its totient is φ = 5214638016.

The previous prime is 12647701441. The next prime is 12647701459. The reversal of 12647701444 is 44410774621.

The square root of 12647701444 is 112462.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1350562500 + 11297138944 = 36750^2 + 106288^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12647701397 and 12647701406.

It is not an unprimeable number, because it can be changed into a prime (12647701441) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 45659434 + ... + 45659710.

Almost surely, 2^12647701444 is an apocalyptic number.

12647701444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12647701444 is the 112462-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12647701444

12647701444 is an abundant number, since it is smaller than the sum of its proper divisors (14114464259).

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

12647701444 is an equidigital number, since it uses as much as digits as its factorization.

12647701444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 40.

The spelling of 12647701444 in words is "twelve billion, six hundred forty-seven million, seven hundred one thousand, four hundred forty-four".