25638261707 has 2 divisors, whose sum is σ = 25638261708. Its totient is φ = 25638261706.

The previous prime is 25638261659. The next prime is 25638261721. The reversal of 25638261707 is 70716283652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25638261707 - 2⁶ = 25638261643 is a prime.

It is not a weakly prime, because it can be changed into another prime (25638261107) 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 as a sum of consecutive naturals, namely, 12819130853 + 12819130854.

It is an arithmetic number, because the mean of its divisors is an integer number (12819130854).

Almost surely, 2^25638261707 is an apocalyptic number.

25638261707 is a deficient number, since it is larger than the sum of its proper divisors (1).

25638261707 is an equidigital number, since it uses as much as digits as its factorization.

25638261707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 25638261707 in words is "twenty-five billion, six hundred thirty-eight million, two hundred sixty-one thousand, seven hundred seven".