25545434502001 has 2 divisors, whose sum is σ = 25545434502002. Its totient is φ = 25545434502000.

The previous prime is 25545434501981. The next prime is 25545434502013. The reversal of 25545434502001 is 10020543454552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16386700706401 + 9158733795600 = 4048049^2 + 3026340^2 .

It is a cyclic number.

It is not a de Polignac number, because 25545434502001 - 2¹¹ = 25545434499953 is a prime.

It is not a weakly prime, because it can be changed into another prime (25545434505001) 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, 12772717251000 + 12772717251001.

It is an arithmetic number, because the mean of its divisors is an integer number (12772717251001).

Almost surely, 2^{25545434502001} is an apocalyptic number.

It is an amenable number.

25545434502001 is a deficient number, since it is larger than the sum of its proper divisors (1).

25545434502001 is an equidigital number, since it uses as much as digits as its factorization.

25545434502001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480000, while the sum is 40.

Adding to 25545434502001 its reverse (10020543454552), we get a palindrome (35565977956553).

The spelling of 25545434502001 in words is "twenty-five trillion, five hundred forty-five billion, four hundred thirty-four million, five hundred two thousand, one".