25655666275 has 24 divisors (see below), whose sum is σ = 34119267120. Its totient is φ = 19077402240.

The previous prime is 25655666207. The next prime is 25655666291. The reversal of 25655666275 is 57266655652.

It is a happy number.

It is not a de Polignac number, because 25655666275 - 2¹¹ = 25655664227 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 484372 + ... + 534721.

It is an arithmetic number, because the mean of its divisors is an integer number (1421636130).

Almost surely, 2^25655666275 is an apocalyptic number.

25655666275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25655666275 is a deficient number, since it is larger than the sum of its proper divisors (8463600845).

25655666275 is a wasteful number, since it uses less digits than its factorization.

25655666275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019175 (or 1019170 counting only the distinct ones).

The product of its digits is 22680000, while the sum is 55.

The spelling of 25655666275 in words is "twenty-five billion, six hundred fifty-five million, six hundred sixty-six thousand, two hundred seventy-five".