25405321004551 has 2 divisors, whose sum is σ = 25405321004552. Its totient is φ = 25405321004550.

The previous prime is 25405321004477. The next prime is 25405321004587. The reversal of 25405321004551 is 15540012350452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25405321004551 - 2¹⁹ = 25405320480263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25405321004551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25405321004351) 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, 12702660502275 + 12702660502276.

It is an arithmetic number, because the mean of its divisors is an integer number (12702660502276).

Almost surely, 2^{25405321004551} is an apocalyptic number.

25405321004551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25405321004551 is an equidigital number, since it uses as much as digits as its factorization.

25405321004551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 25405321004551 in words is "twenty-five trillion, four hundred five billion, three hundred twenty-one million, four thousand, five hundred fifty-one".