25256087975 has 12 divisors (see below), whose sum is σ = 31509686376. Its totient is φ = 20080910880.

The previous prime is 25256087971. The next prime is 25256087993. The reversal of 25256087975 is 57978065252.

It is a happy number.

It is not a de Polignac number, because 25256087975 - 2² = 25256087971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25256087975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25256087971) 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 11 ways as a sum of consecutive naturals, for example, 3094832 + ... + 3102981.

It is an arithmetic number, because the mean of its divisors is an integer number (2625807198).

Almost surely, 2^25256087975 is an apocalyptic number.

25256087975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25256087975 is a deficient number, since it is larger than the sum of its proper divisors (6253598401).

25256087975 is a wasteful number, since it uses less digits than its factorization.

25256087975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6197986 (or 6197981 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 56.

The spelling of 25256087975 in words is "twenty-five billion, two hundred fifty-six million, eighty-seven thousand, nine hundred seventy-five".