25630799659909 has 2 divisors, whose sum is σ = 25630799659910. Its totient is φ = 25630799659908.

The previous prime is 25630799659903. The next prime is 25630799659943. The reversal of 25630799659909 is 90995699703652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16459005580900 + 9171794079009 = 4056970^2 + 3028497^2 .

It is a cyclic number.

It is not a de Polignac number, because 25630799659909 - 2¹¹ = 25630799657861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25630799659903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12815399829954 + 12815399829955.

It is an arithmetic number, because the mean of its divisors is an integer number (12815399829955).

Almost surely, 2^{25630799659909} is an apocalyptic number.

It is an amenable number.

25630799659909 is a deficient number, since it is larger than the sum of its proper divisors (1).

25630799659909 is an equidigital number, since it uses as much as digits as its factorization.

25630799659909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2232052200, while the sum is 79.

The spelling of 25630799659909 in words is "twenty-five trillion, six hundred thirty billion, seven hundred ninety-nine million, six hundred fifty-nine thousand, nine hundred nine".