25006678225 has 9 divisors (see below), whose sum is σ = 31009261467. Its totient is φ = 20004710040.

The previous prime is 25006678159. The next prime is 25006678243. The reversal of 25006678225 is 52287660052.

The square root of 25006678225 is 158135.

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

It can be written as a sum of positive squares in only one way, i.e., 9002404161 + 16004274064 = 94881^2 + 126508^2 .

It is not a de Polignac number, because 25006678225 - 2¹⁵ = 25006645457 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, 774862 + ... + 806488.

Almost surely, 2^25006678225 is an apocalyptic number.

25006678225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25006678225 is the 158135-th square number.

25006678225 is the 79068-th centered octagonal number.

It is an amenable number.

25006678225 is a deficient number, since it is larger than the sum of its proper divisors (6002583242).

25006678225 is an frugal number, since it uses more digits than its factorization.

25006678225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63264 (or 31632 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 25006678225 in words is "twenty-five billion, six million, six hundred seventy-eight thousand, two hundred twenty-five".