25435555559 has 2 divisors, whose sum is σ = 25435555560. Its totient is φ = 25435555558.

The previous prime is 25435555547. The next prime is 25435555577. The reversal of 25435555559 is 95555553452.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25435555559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25435555559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25435557559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12717777779 + 12717777780.

It is an arithmetic number, because the mean of its divisors is an integer number (12717777780).

Almost surely, 2^25435555559 is an apocalyptic number.

25435555559 is a deficient number, since it is larger than the sum of its proper divisors (1).

25435555559 is an equidigital number, since it uses as much as digits as its factorization.

25435555559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16875000, while the sum is 53.

The spelling of 25435555559 in words is "twenty-five billion, four hundred thirty-five million, five hundred fifty-five thousand, five hundred fifty-nine".