25845881369 has 16 divisors (see below), whose sum is σ = 32275553280. Its totient is φ = 20107074960.

The previous prime is 25845881273. The next prime is 25845881407. The reversal of 25845881369 is 96318854852.

It is not a de Polignac number, because 25845881369 - 2¹² = 25845877273 is a prime.

It is a super-2 number, since 2×25845881369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25845881569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223469 + ... + 318794.

It is an arithmetic number, because the mean of its divisors is an integer number (2017222080).

Almost surely, 2^25845881369 is an apocalyptic number.

It is an amenable number.

25845881369 is a deficient number, since it is larger than the sum of its proper divisors (6429671911).

25845881369 is a wasteful number, since it uses less digits than its factorization.

25845881369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542900.

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

The spelling of 25845881369 in words is "twenty-five billion, eight hundred forty-five million, eight hundred eighty-one thousand, three hundred sixty-nine".