25613023241 has 4 divisors (see below), whose sum is σ = 27583255812. Its totient is φ = 23642790672.

The previous prime is 25613023237. The next prime is 25613023253. The reversal of 25613023241 is 14232031652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5461801216 + 20151222025 = 73904^2 + 141955^2 .

It is a cyclic number.

It is not a de Polignac number, because 25613023241 - 2² = 25613023237 is a prime.

It is a super-2 number, since 2×25613023241² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25613023211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 985116266 + ... + 985116291.

It is an arithmetic number, because the mean of its divisors is an integer number (6895813953).

Almost surely, 2^25613023241 is an apocalyptic number.

It is an amenable number.

25613023241 is a deficient number, since it is larger than the sum of its proper divisors (1970232571).

25613023241 is a wasteful number, since it uses less digits than its factorization.

25613023241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970232570.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 25613023241 its reverse (14232031652), we get a palindrome (39845054893).

The spelling of 25613023241 in words is "twenty-five billion, six hundred thirteen million, twenty-three thousand, two hundred forty-one".