6539148225 has 63 divisors (see below), whose sum is σ = 12177584083. Its totient is φ = 3481723440.

The previous prime is 6539148223. The next prime is 6539148227. The reversal of 6539148225 is 5228419356.

The square root of 6539148225 is 80865.

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

6539148225 is a `hidden beast` number, since 6 + 539 + 14 + 82 + 25 = 666.

It is an interprime number because it is at equal distance from previous prime (6539148223) and next prime (6539148227).

It can be written as a sum of positive squares in only one way, i.e., 2354093361 + 4185054864 = 48519^2 + 64692^2 .

It is not a de Polignac number, because 6539148225 - 2¹ = 6539148223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6539148223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 10916476 + ... + 10917074.

Almost surely, 2^6539148225 is an apocalyptic number.

6539148225 is the 80865-th square number.

6539148225 is the 40433-rd centered octagonal number.

It is an amenable number.

6539148225 is a deficient number, since it is larger than the sum of its proper divisors (5638435858).

6539148225 is an frugal number, since it uses more digits than its factorization.

6539148225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226 (or 607 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The cubic root of 6539148225 is about 1869.9947786942.

The spelling of 6539148225 in words is "six billion, five hundred thirty-nine million, one hundred forty-eight thousand, two hundred twenty-five".