25865967241 has 3 divisors (see below), whose sum is σ = 25866128071. Its totient is φ = 25865806412.

The previous prime is 25865967229. The next prime is 25865967251. The reversal of 25865967241 is 14276956852.

The square root of 25865967241 is 160829.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 54331641 + 25811635600 = 7371^2 + 160660^2 .

It is not a de Polignac number, because 25865967241 - 2¹¹ = 25865965193 is a prime.

It is a super-2 number, since 2×25865967241² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25865967251) 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 2 ways as a sum of consecutive naturals, for example, 80415 + ... + 241243.

Almost surely, 2^25865967241 is an apocalyptic number.

25865967241 is the 160829-th square number.

25865967241 is the 80415-th centered octagonal number.

It is an amenable number.

25865967241 is a deficient number, since it is larger than the sum of its proper divisors (160830).

25865967241 is an frugal number, since it uses more digits than its factorization.

25865967241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321658 (or 160829 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 55.

The spelling of 25865967241 in words is "twenty-five billion, eight hundred sixty-five million, nine hundred sixty-seven thousand, two hundred forty-one".