3678206158225 has 9 divisors (see below), whose sum is σ = 4560987526993. Its totient is φ = 2942557255120.

The previous prime is 3678206158177. The next prime is 3678206158247. The reversal of 3678206158225 is 5228516028763.

The square root of 3678206158225 is 1917865.

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

3678206158225 is digitally balanced in base 2, 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 4 ways, for example, as 2032999743889 + 1645206414336 = 1425833^2 + 1282656^2 .

It is not a de Polignac number, because 3678206158225 - 2⁹ = 3678206157713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9397539 + ... + 9781111.

Almost surely, 2^{3678206158225} is an apocalyptic number.

3678206158225 is the 1917865-th square number.

3678206158225 is the 958933-rd centered octagonal number.

It is an amenable number.

3678206158225 is a deficient number, since it is larger than the sum of its proper divisors (882781368768).

3678206158225 is an frugal number, since it uses more digits than its factorization.

3678206158225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767156 (or 383578 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 3678206158225 in words is "three trillion, six hundred seventy-eight billion, two hundred six million, one hundred fifty-eight thousand, two hundred twenty-five".