25530525254891 has 2 divisors, whose sum is σ = 25530525254892. Its totient is φ = 25530525254890.

The previous prime is 25530525254833. The next prime is 25530525255091. The reversal of 25530525254891 is 19845252503552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25530525254891 - 2¹⁴ = 25530525238507 is a prime.

It is not a weakly prime, because it can be changed into another prime (25530525254821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12765262627445 + 12765262627446.

It is an arithmetic number, because the mean of its divisors is an integer number (12765262627446).

Almost surely, 2^{25530525254891} is an apocalyptic number.

25530525254891 is a deficient number, since it is larger than the sum of its proper divisors (1).

25530525254891 is an equidigital number, since it uses as much as digits as its factorization.

25530525254891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600000, while the sum is 56.

The spelling of 25530525254891 in words is "twenty-five trillion, five hundred thirty billion, five hundred twenty-five million, two hundred fifty-four thousand, eight hundred ninety-one".