25018065241 has 21 divisors (see below), whose sum is σ = 28321957119. Its totient is φ = 22089529176.

The previous prime is 25018065223. The next prime is 25018065313. The reversal of 25018065241 is 14256081052.

It is a happy number.

The square root of 25018065241 is 158171.

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., 3700897225 + 21317168016 = 60835^2 + 146004^2 .

It is not a de Polignac number, because 25018065241 - 2⁵ = 25018065209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25018065197 and 25018065206.

It is not an unprimeable number, because it can be changed into a prime (25018065221) 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 20 ways as a sum of consecutive naturals, for example, 1087741956 + ... + 1087741978.

Almost surely, 2^25018065241 is an apocalyptic number.

25018065241 is the 158171-st square number.

25018065241 is the 79086-th centered octagonal number.

It is an amenable number.

25018065241 is a deficient number, since it is larger than the sum of its proper divisors (3303891878).

25018065241 is an frugal number, since it uses more digits than its factorization.

25018065241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 25018065241 in words is "twenty-five billion, eighteen million, sixty-five thousand, two hundred forty-one".