13845825869 has 2 divisors, whose sum is σ = 13845825870. Its totient is φ = 13845825868.

The previous prime is 13845825827. The next prime is 13845825883. The reversal of 13845825869 is 96852854831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13501278025 + 344547844 = 116195^2 + 18562^2 .

It is an emirp because it is prime and its reverse (96852854831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13845825869 - 2⁸ = 13845825613 is a prime.

It is a super-2 number, since 2×13845825869² (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 (13845825809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6922912934 + 6922912935.

It is an arithmetic number, because the mean of its divisors is an integer number (6922912935).

Almost surely, 2^13845825869 is an apocalyptic number.

It is an amenable number.

13845825869 is a deficient number, since it is larger than the sum of its proper divisors (1).

13845825869 is an equidigital number, since it uses as much as digits as its factorization.

13845825869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16588800, while the sum is 59.

The spelling of 13845825869 in words is "thirteen billion, eight hundred forty-five million, eight hundred twenty-five thousand, eight hundred sixty-nine".