27525252505 has 4 divisors (see below), whose sum is σ = 33030303012. Its totient is φ = 22020202000.

The previous prime is 27525252499. The next prime is 27525252509. The reversal of 27525252505 is 50525252572.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4884332544 + 22640919961 = 69888^2 + 150469^2 .

It is not a de Polignac number, because 27525252505 - 2¹¹ = 27525250457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27525252509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2752525246 + ... + 2752525255.

It is an arithmetic number, because the mean of its divisors is an integer number (8257575753).

Almost surely, 2^27525252505 is an apocalyptic number.

It is an amenable number.

27525252505 is a deficient number, since it is larger than the sum of its proper divisors (5505050507).

27525252505 is an equidigital number, since it uses as much as digits as its factorization.

27525252505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5505050506.

The product of its (nonzero) digits is 350000, while the sum is 40.

The spelling of 27525252505 in words is "twenty-seven billion, five hundred twenty-five million, two hundred fifty-two thousand, five hundred five".