25013809287 has 16 divisors (see below), whose sum is σ = 37068813280. Its totient is φ = 16670779776.

The previous prime is 25013809277. The next prime is 25013809309. The reversal of 25013809287 is 78290831052.

It is a happy number.

It is not a de Polignac number, because 25013809287 - 2¹⁹ = 25013284999 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 (25013809217) 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 15 ways as a sum of consecutive naturals, for example, 50368 + ... + 229269.

It is an arithmetic number, because the mean of its divisors is an integer number (2316800830).

Almost surely, 2^25013809287 is an apocalyptic number.

25013809287 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

25013809287 is a deficient number, since it is larger than the sum of its proper divisors (12055003993).

25013809287 is a wasteful number, since it uses less digits than its factorization.

25013809287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282959 (or 282953 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 25013809287 in words is "twenty-five billion, thirteen million, eight hundred nine thousand, two hundred eighty-seven".