25525028285 has 8 divisors (see below), whose sum is σ = 30635967960. Its totient is φ = 20416066624.

The previous prime is 25525028261. The next prime is 25525028299. The reversal of 25525028285 is 58282052552.

It can be written as a sum of positive squares in 4 ways, for example, as 8300303236 + 17224725049 = 91106^2 + 131243^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25525028285 - 2²⁰ = 25523979709 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 465962 + ... + 517851.

It is an arithmetic number, because the mean of its divisors is an integer number (3829495995).

Almost surely, 2^25525028285 is an apocalyptic number.

It is an amenable number.

25525028285 is a deficient number, since it is larger than the sum of its proper divisors (5110939675).

25525028285 is an equidigital number, since it uses as much as digits as its factorization.

25525028285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989007.

The product of its (nonzero) digits is 640000, while the sum is 44.

The spelling of 25525028285 in words is "twenty-five billion, five hundred twenty-five million, twenty-eight thousand, two hundred eighty-five".