25506627533 has 2 divisors, whose sum is σ = 25506627534. Its totient is φ = 25506627532.

The previous prime is 25506627521. The next prime is 25506627571. The reversal of 25506627533 is 33572660552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22643628484 + 2862999049 = 150478^2 + 53507^2 .

It is a cyclic number.

It is not a de Polignac number, because 25506627533 - 2¹⁴ = 25506611149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25506623533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12753313766 + 12753313767.

It is an arithmetic number, because the mean of its divisors is an integer number (12753313767).

Almost surely, 2^25506627533 is an apocalyptic number.

It is an amenable number.

25506627533 is a deficient number, since it is larger than the sum of its proper divisors (1).

25506627533 is an equidigital number, since it uses as much as digits as its factorization.

25506627533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134000, while the sum is 44.

The spelling of 25506627533 in words is "twenty-five billion, five hundred six million, six hundred twenty-seven thousand, five hundred thirty-three".