25604674639 has 2 divisors, whose sum is σ = 25604674640. Its totient is φ = 25604674638.

The previous prime is 25604674603. The next prime is 25604674717. The reversal of 25604674639 is 93647640652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25604674639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25604674439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12802337319 + 12802337320.

It is an arithmetic number, because the mean of its divisors is an integer number (12802337320).

Almost surely, 2^25604674639 is an apocalyptic number.

25604674639 is a deficient number, since it is larger than the sum of its proper divisors (1).

25604674639 is an equidigital number, since it uses as much as digits as its factorization.

25604674639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 25604674639 in words is "twenty-five billion, six hundred four million, six hundred seventy-four thousand, six hundred thirty-nine".