13456642469 has 2 divisors, whose sum is σ = 13456642470. Its totient is φ = 13456642468.

The previous prime is 13456642447. The next prime is 13456642477. The reversal of 13456642469 is 96424665431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6874565569 + 6582076900 = 82913^2 + 81130^2 .

It is a cyclic number.

It is not a de Polignac number, because 13456642469 - 2²⁸ = 13188207013 is a prime.

It is a super-2 number, since 2×13456642469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13456642429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6728321234 + 6728321235.

It is an arithmetic number, because the mean of its divisors is an integer number (6728321235).

Almost surely, 2^13456642469 is an apocalyptic number.

It is an amenable number.

13456642469 is a deficient number, since it is larger than the sum of its proper divisors (1).

13456642469 is an equidigital number, since it uses as much as digits as its factorization.

13456642469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 50.

The spelling of 13456642469 in words is "thirteen billion, four hundred fifty-six million, six hundred forty-two thousand, four hundred sixty-nine".