25555505047 has 2 divisors, whose sum is σ = 25555505048. Its totient is φ = 25555505046.

The previous prime is 25555505029. The next prime is 25555505081. The reversal of 25555505047 is 74050555552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25555505047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25555504994 and 25555505012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25555505347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777752523 + 12777752524.

It is an arithmetic number, because the mean of its divisors is an integer number (12777752524).

Almost surely, 2^25555505047 is an apocalyptic number.

25555505047 is a deficient number, since it is larger than the sum of its proper divisors (1).

25555505047 is an equidigital number, since it uses as much as digits as its factorization.

25555505047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 875000, while the sum is 43.

The spelling of 25555505047 in words is "twenty-five billion, five hundred fifty-five million, five hundred five thousand, forty-seven".