12175572649 has 2 divisors, whose sum is σ = 12175572650. Its totient is φ = 12175572648.

The previous prime is 12175572637. The next prime is 12175572653. The reversal of 12175572649 is 94627557121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7937562649 + 4238010000 = 89093^2 + 65100^2 .

It is a cyclic number.

It is not a de Polignac number, because 12175572649 - 2⁹ = 12175572137 is a prime.

It is not a weakly prime, because it can be changed into another prime (12175576649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6087786324 + 6087786325.

It is an arithmetic number, because the mean of its divisors is an integer number (6087786325).

Almost surely, 2^12175572649 is an apocalyptic number.

It is an amenable number.

12175572649 is a deficient number, since it is larger than the sum of its proper divisors (1).

12175572649 is an equidigital number, since it uses as much as digits as its factorization.

12175572649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 49.

The spelling of 12175572649 in words is "twelve billion, one hundred seventy-five million, five hundred seventy-two thousand, six hundred forty-nine".