27395215225 has 27 divisors (see below), whose sum is σ = 39524558157. Its totient is φ = 18781318080.

The previous prime is 27395215187. The next prime is 27395215231. The reversal of 27395215225 is 52251259372.

The square root of 27395215225 is 165515.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 13637801961 + 13757413264 = 116781^2 + 117292^2 .

It is a de Polignac number, because none of the positive numbers 2^k-27395215225 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 26 ways as a sum of consecutive naturals, for example, 5790661 + ... + 5795389.

Almost surely, 2^27395215225 is an apocalyptic number.

27395215225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27395215225 is the 165515-th square number.

27395215225 is the 82758-th centered octagonal number.

It is an amenable number.

27395215225 is a deficient number, since it is larger than the sum of its proper divisors (12129342932).

27395215225 is an frugal number, since it uses more digits than its factorization.

27395215225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9482 (or 4741 counting only the distinct ones).

The product of its digits is 378000, while the sum is 43.

The spelling of 27395215225 in words is "twenty-seven billion, three hundred ninety-five million, two hundred fifteen thousand, two hundred twenty-five".