12427951009 has 2 divisors, whose sum is σ = 12427951010. Its totient is φ = 12427951008.

The previous prime is 12427950989. The next prime is 12427951033. The reversal of 12427951009 is 90015972421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12329881600 + 98069409 = 111040^2 + 9903^2 .

It is a cyclic number.

It is not a de Polignac number, because 12427951009 - 2²¹ = 12425853857 is a prime.

It is not a weakly prime, because it can be changed into another prime (12427951049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6213975504 + 6213975505.

It is an arithmetic number, because the mean of its divisors is an integer number (6213975505).

Almost surely, 2^12427951009 is an apocalyptic number.

It is an amenable number.

12427951009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12427951009 is an equidigital number, since it uses as much as digits as its factorization.

12427951009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 12427951009 in words is "twelve billion, four hundred twenty-seven million, nine hundred fifty-one thousand, nine".