12712421648 has 10 divisors (see below), whose sum is σ = 24630316974. Its totient is φ = 6356210816.

The previous prime is 12712421647. The next prime is 12712421677. The reversal of 12712421648 is 84612421721.

It can be written as a sum of positive squares in only one way, i.e., 7370565904 + 5341855744 = 85852^2 + 73088^2 .

It is not an unprimeable number, because it can be changed into a prime (12712421647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 397263161 + ... + 397263192.

Almost surely, 2^12712421648 is an apocalyptic number.

It is an amenable number.

12712421648 is a deficient number, since it is larger than the sum of its proper divisors (11917895326).

12712421648 is an equidigital number, since it uses as much as digits as its factorization.

12712421648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794526361 (or 794526355 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The spelling of 12712421648 in words is "twelve billion, seven hundred twelve million, four hundred twenty-one thousand, six hundred forty-eight".