25878250269 has 24 divisors (see below), whose sum is σ = 38129014872. Its totient is φ = 16907080320.

The previous prime is 25878250259. The next prime is 25878250283. The reversal of 25878250269 is 96205287852.

It is a happy number.

25878250269 is a `hidden beast` number, since 2 + 5 + 8 + 78 + 2 + 502 + 69 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9433265625 + 16444984644 = 97125^2 + 128238^2 .

It is not a de Polignac number, because 25878250269 - 2²¹ = 25876153117 is a prime.

It is a super-2 number, since 2×25878250269² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25878250219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 387399 + ... + 449259.

It is an arithmetic number, because the mean of its divisors is an integer number (1588708953).

Almost surely, 2^25878250269 is an apocalyptic number.

It is an amenable number.

25878250269 is a deficient number, since it is larger than the sum of its proper divisors (12250764603).

25878250269 is a wasteful number, since it uses less digits than its factorization.

25878250269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62797 (or 62794 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 25878250269 in words is "twenty-five billion, eight hundred seventy-eight million, two hundred fifty thousand, two hundred sixty-nine".