27205770225 has 96 divisors (see below), whose sum is σ = 50756751360. Its totient is φ = 12783907840.

The previous prime is 27205770139. The next prime is 27205770227. The reversal of 27205770225 is 52207750272.

It is not a de Polignac number, because 27205770225 - 2⁹ = 27205769713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27205770227) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1368406 + ... + 1388144.

It is an arithmetic number, because the mean of its divisors is an integer number (528716160).

Almost surely, 2^27205770225 is an apocalyptic number.

27205770225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27205770225 is a deficient number, since it is larger than the sum of its proper divisors (23550981135).

27205770225 is a wasteful number, since it uses less digits than its factorization.

27205770225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19839 (or 19834 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 39.

The spelling of 27205770225 in words is "twenty-seven billion, two hundred five million, seven hundred seventy thousand, two hundred twenty-five".