3725081422209 has 81 divisors (see below), whose sum is σ = 6351111313443. Its totient is φ = 2097791244864.

The previous prime is 3725081422201. The next prime is 3725081422241. The reversal of 3725081422209 is 9022241805273.

The square root of 3725081422209 is 1930047.

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

3725081422209 is a `hidden beast` number, since 37 + 250 + 8 + 142 + 220 + 9 = 666.

3725081422209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2114537681025 + 1610543741184 = 1454145^2 + 1269072^2 .

It is not a de Polignac number, because 3725081422209 - 2³ = 3725081422201 is a prime.

It is a super-2 number, since 2×3725081422209² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3725081422201) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2958761422 + ... + 2958762680.

Almost surely, 2^{3725081422209} is an apocalyptic number.

3725081422209 is the 1930047-th square number.

3725081422209 is the 965024-th centered octagonal number.

It is an amenable number.

3725081422209 is a deficient number, since it is larger than the sum of its proper divisors (2626029891234).

3725081422209 is an frugal number, since it uses more digits than its factorization.

3725081422209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 3725081422209 in words is "three trillion, seven hundred twenty-five billion, eighty-one million, four hundred twenty-two thousand, two hundred nine".