12642473267449 has 2 divisors, whose sum is σ = 12642473267450. Its totient is φ = 12642473267448.

The previous prime is 12642473267399. The next prime is 12642473267461. The reversal of 12642473267449 is 94476237424621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11358874905849 + 1283598361600 = 3370293^2 + 1132960^2 .

It is a cyclic number.

It is not a de Polignac number, because 12642473267449 - 2¹³ = 12642473259257 is a prime.

It is not a weakly prime, because it can be changed into another prime (12642473261449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6321236633724 + 6321236633725.

It is an arithmetic number, because the mean of its divisors is an integer number (6321236633725).

Almost surely, 2^{12642473267449} is an apocalyptic number.

It is an amenable number.

12642473267449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12642473267449 is an equidigital number, since it uses as much as digits as its factorization.

12642473267449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97542144, while the sum is 61.

The spelling of 12642473267449 in words is "twelve trillion, six hundred forty-two billion, four hundred seventy-three million, two hundred sixty-seven thousand, four hundred forty-nine".