25241611643 has 2 divisors, whose sum is σ = 25241611644. Its totient is φ = 25241611642.

The previous prime is 25241611631. The next prime is 25241611651. The reversal of 25241611643 is 34611614252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25241611643 - 2⁸ = 25241611387 is a prime.

It is not a weakly prime, because it can be changed into another prime (25241641643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12620805821 + 12620805822.

It is an arithmetic number, because the mean of its divisors is an integer number (12620805822).

Almost surely, 2^25241611643 is an apocalyptic number.

25241611643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25241611643 is an equidigital number, since it uses as much as digits as its factorization.

25241611643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The spelling of 25241611643 in words is "twenty-five billion, two hundred forty-one million, six hundred eleven thousand, six hundred forty-three".