12642422069 has 2 divisors, whose sum is σ = 12642422070. Its totient is φ = 12642422068.

The previous prime is 12642422063. The next prime is 12642422099. The reversal of 12642422069 is 96022424621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11830912900 + 811509169 = 108770^2 + 28487^2 .

It is a cyclic number.

It is not a de Polignac number, because 12642422069 - 2¹⁶ = 12642356533 is a prime.

It is a super-2 number, since 2×12642422069² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12642422063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6321211034 + 6321211035.

It is an arithmetic number, because the mean of its divisors is an integer number (6321211035).

Almost surely, 2^12642422069 is an apocalyptic number.

It is an amenable number.

12642422069 is a deficient number, since it is larger than the sum of its proper divisors (1).

12642422069 is an equidigital number, since it uses as much as digits as its factorization.

12642422069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 12642422069 in words is "twelve billion, six hundred forty-two million, four hundred twenty-two thousand, sixty-nine".