25508085285 has 32 divisors (see below), whose sum is σ = 43437686400. Its totient is φ = 12737691648.

The previous prime is 25508085283. The next prime is 25508085287. The reversal of 25508085285 is 58258080552.

It is an interprime number because it is at equal distance from previous prime (25508085283) and next prime (25508085287).

It is not a de Polignac number, because 25508085285 - 2¹ = 25508085283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25508085283) 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 31 ways as a sum of consecutive naturals, for example, 209935 + ... + 308364.

It is an arithmetic number, because the mean of its divisors is an integer number (1357427700).

Almost surely, 2^25508085285 is an apocalyptic number.

It is an amenable number.

25508085285 is a deficient number, since it is larger than the sum of its proper divisors (17929601115).

25508085285 is a wasteful number, since it uses less digits than its factorization.

25508085285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518517.

The product of its (nonzero) digits is 1280000, while the sum is 48.

The spelling of 25508085285 in words is "twenty-five billion, five hundred eight million, eighty-five thousand, two hundred eighty-five".