25385132287 has 4 divisors (see below), whose sum is σ = 25385618016. Its totient is φ = 25384646560.

The previous prime is 25385132273. The next prime is 25385132303. The reversal of 25385132287 is 78223158352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25385132287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25385132387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153514 + ... + 272647.

It is an arithmetic number, because the mean of its divisors is an integer number (6346404504).

Almost surely, 2^25385132287 is an apocalyptic number.

25385132287 is a deficient number, since it is larger than the sum of its proper divisors (485729).

25385132287 is an equidigital number, since it uses as much as digits as its factorization.

25385132287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485728.

The product of its digits is 806400, while the sum is 46.

The spelling of 25385132287 in words is "twenty-five billion, three hundred eighty-five million, one hundred thirty-two thousand, two hundred eighty-seven".