25256034641 has 8 divisors (see below), whose sum is σ = 25285478400. Its totient is φ = 25226611168.

The previous prime is 25256034631. The next prime is 25256034679. The reversal of 25256034641 is 14643065252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25256034641 - 2⁶ = 25256034577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25256034595 and 25256034604.

It is not an unprimeable number, because it can be changed into a prime (25256034631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4315085 + ... + 4320933.

It is an arithmetic number, because the mean of its divisors is an integer number (3160684800).

Almost surely, 2^25256034641 is an apocalyptic number.

It is an amenable number.

25256034641 is a deficient number, since it is larger than the sum of its proper divisors (29443759).

25256034641 is a wasteful number, since it uses less digits than its factorization.

25256034641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10143.

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 25256034641 its reverse (14643065252), we get a palindrome (39899099893).

The spelling of 25256034641 in words is "twenty-five billion, two hundred fifty-six million, thirty-four thousand, six hundred forty-one".