25552552717 has 2 divisors, whose sum is σ = 25552552718. Its totient is φ = 25552552716.

The previous prime is 25552552699. The next prime is 25552552783. The reversal of 25552552717 is 71725525552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19901873476 + 5650679241 = 141074^2 + 75171^2 .

It is a cyclic number.

It is not a de Polignac number, because 25552552717 - 2⁷ = 25552552589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25552552787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12776276358 + 12776276359.

It is an arithmetic number, because the mean of its divisors is an integer number (12776276359).

Almost surely, 2^25552552717 is an apocalyptic number.

It is an amenable number.

25552552717 is a deficient number, since it is larger than the sum of its proper divisors (1).

25552552717 is an equidigital number, since it uses as much as digits as its factorization.

25552552717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1225000, while the sum is 46.

The spelling of 25552552717 in words is "twenty-five billion, five hundred fifty-two million, five hundred fifty-two thousand, seven hundred seventeen".