25775454407869 has 2 divisors, whose sum is σ = 25775454407870. Its totient is φ = 25775454407868.

The previous prime is 25775454407863. The next prime is 25775454407897. The reversal of 25775454407869 is 96870445457752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24105252284100 + 1670202123769 = 4909710^2 + 1292363^2 .

It is a cyclic number.

It is not a de Polignac number, because 25775454407869 - 2³ = 25775454407861 is a prime.

It is a super-2 number, since 2×25775454407869² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25775454407861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12887727203934 + 12887727203935.

It is an arithmetic number, because the mean of its divisors is an integer number (12887727203935).

Almost surely, 2^{25775454407869} is an apocalyptic number.

It is an amenable number.

25775454407869 is a deficient number, since it is larger than the sum of its proper divisors (1).

25775454407869 is an equidigital number, since it uses as much as digits as its factorization.

25775454407869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816000, while the sum is 73.

The spelling of 25775454407869 in words is "twenty-five trillion, seven hundred seventy-five billion, four hundred fifty-four million, four hundred seven thousand, eight hundred sixty-nine".