27805252805525 has 48 divisors (see below), whose sum is σ = 38711084582016. Its totient is φ = 19677187595520.

The previous prime is 27805252805509. The next prime is 27805252805557. The reversal of 27805252805525 is 52550825250872.

It is not a de Polignac number, because 27805252805525 - 2⁴ = 27805252805509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18029537 + ... + 19510886.

It is an arithmetic number, because the mean of its divisors is an integer number (806480928792).

Almost surely, 2^{27805252805525} is an apocalyptic number.

27805252805525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27805252805525 is a deficient number, since it is larger than the sum of its proper divisors (10905831776491).

27805252805525 is a wasteful number, since it uses less digits than its factorization.

27805252805525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37540542 (or 37540537 counting only the distinct ones).

The product of its (nonzero) digits is 22400000, while the sum is 56.

The spelling of 27805252805525 in words is "twenty-seven trillion, eight hundred five billion, two hundred fifty-two million, eight hundred five thousand, five hundred twenty-five".