27987508225 has 6 divisors (see below), whose sum is σ = 34704510230. Its totient is φ = 22390006560.

The previous prime is 27987508223. The next prime is 27987508259. The reversal of 27987508225 is 52280578972.

It can be written as a sum of positive squares in 3 ways, for example, as 1133803584 + 26853704641 = 33672^2 + 163871^2 .

It is not a de Polignac number, because 27987508225 - 2¹ = 27987508223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27987508223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 559750140 + ... + 559750189.

Almost surely, 2^27987508225 is an apocalyptic number.

27987508225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27987508225 is a deficient number, since it is larger than the sum of its proper divisors (6717002005).

27987508225 is a wasteful number, since it uses less digits than its factorization.

27987508225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119500339 (or 1119500334 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 55.

The spelling of 27987508225 in words is "twenty-seven billion, nine hundred eighty-seven million, five hundred eight thousand, two hundred twenty-five".