3995541243225 has 81 divisors (see below), whose sum is σ = 8325296995197. Its totient is φ = 1826437193280.

The previous prime is 3995541243173. The next prime is 3995541243241. The reversal of 3995541243225 is 5223421455993.

The square root of 3995541243225 is 1998885.

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

3995541243225 is a `hidden beast` number, since 3 + 9 + 95 + 541 + 2 + 4 + 3 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2277071946009 + 1718469297216 = 1508997^2 + 1310904^2 .

It is not a de Polignac number, because 3995541243225 - 2³⁵ = 3961181504857 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 80 ways as a sum of consecutive naturals, for example, 209873407 + ... + 209892443.

Almost surely, 2^{3995541243225} is an apocalyptic number.

3995541243225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3995541243225 is the 1998885-th square number.

3995541243225 is the 999443-rd centered octagonal number.

It is an amenable number.

3995541243225 is an abundant number, since it is smaller than the sum of its proper divisors (4329755751972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3995541243225 is an frugal number, since it uses more digits than its factorization.

3995541243225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38104 (or 19052 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 54.

The spelling of 3995541243225 in words is "three trillion, nine hundred ninety-five billion, five hundred forty-one million, two hundred forty-three thousand, two hundred twenty-five".