25630799659987 has 2 divisors, whose sum is σ = 25630799659988. Its totient is φ = 25630799659986.

The previous prime is 25630799659951. The next prime is 25630799660077. The reversal of 25630799659987 is 78995699703652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25630799659987 - 2¹⁹ = 25630799135699 is a prime.

It is not a weakly prime, because it can be changed into another prime (25630799657987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12815399829993 + 12815399829994.

It is an arithmetic number, because the mean of its divisors is an integer number (12815399829994).

Almost surely, 2^{25630799659987} is an apocalyptic number.

25630799659987 is a deficient number, since it is larger than the sum of its proper divisors (1).

25630799659987 is an equidigital number, since it uses as much as digits as its factorization.

25630799659987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13888324800, while the sum is 85.

The spelling of 25630799659987 in words is "twenty-five trillion, six hundred thirty billion, seven hundred ninety-nine million, six hundred fifty-nine thousand, nine hundred eighty-seven".