25545355607801 has 2 divisors, whose sum is σ = 25545355607802. Its totient is φ = 25545355607800.

The previous prime is 25545355607791. The next prime is 25545355607843. The reversal of 25545355607801 is 10870655354552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16769844010000 + 8775511597801 = 4095100^2 + 2962349^2 .

It is a cyclic number.

It is not a de Polignac number, because 25545355607801 - 2²² = 25545351413497 is a prime.

It is not a weakly prime, because it can be changed into another prime (25545355607501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12772677803900 + 12772677803901.

It is an arithmetic number, because the mean of its divisors is an integer number (12772677803901).

Almost surely, 2^{25545355607801} is an apocalyptic number.

It is an amenable number.

25545355607801 is a deficient number, since it is larger than the sum of its proper divisors (1).

25545355607801 is an equidigital number, since it uses as much as digits as its factorization.

25545355607801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200000, while the sum is 56.

The spelling of 25545355607801 in words is "twenty-five trillion, five hundred forty-five billion, three hundred fifty-five million, six hundred seven thousand, eight hundred one".