25506659999959 has 2 divisors, whose sum is σ = 25506659999960. Its totient is φ = 25506659999958.

The previous prime is 25506659999927. The next prime is 25506660000023. The reversal of 25506659999959 is 95999995660552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25506659999959 - 2⁵ = 25506659999927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25506659999959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25506650999959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12753329999979 + 12753329999980.

It is an arithmetic number, because the mean of its divisors is an integer number (12753329999980).

Almost surely, 2^{25506659999959} is an apocalyptic number.

25506659999959 is a deficient number, since it is larger than the sum of its proper divisors (1).

25506659999959 is an equidigital number, since it uses as much as digits as its factorization.

25506659999959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23914845000, while the sum is 88.

The spelling of 25506659999959 in words is "twenty-five trillion, five hundred six billion, six hundred fifty-nine million, nine hundred ninety-nine thousand, nine hundred fifty-nine".