25965568287 has 24 divisors (see below), whose sum is σ = 39114857600. Its totient is φ = 16579261440.

The previous prime is 25965568271. The next prime is 25965568313. The reversal of 25965568287 is 78286556952.

25965568287 is a `hidden beast` number, since 2 + 5 + 9 + 65 + 568 + 2 + 8 + 7 = 666.

It is not a de Polignac number, because 25965568287 - 2⁴ = 25965568271 is a prime.

It is a super-2 number, since 2×25965568287² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25965568217) 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, 452662 + ... + 506787.

Almost surely, 2^25965568287 is an apocalyptic number.

25965568287 is a deficient number, since it is larger than the sum of its proper divisors (13149289313).

25965568287 is a wasteful number, since it uses less digits than its factorization.

25965568287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959583 (or 959580 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 63.

The spelling of 25965568287 in words is "twenty-five billion, nine hundred sixty-five million, five hundred sixty-eight thousand, two hundred eighty-seven".