25255774755493 has 2 divisors, whose sum is σ = 25255774755494. Its totient is φ = 25255774755492.

The previous prime is 25255774755473. The next prime is 25255774755529. The reversal of 25255774755493 is 39455747755252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24770310012484 + 485464743009 = 4976978^2 + 696753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25255774755493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25255774755433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12627887377746 + 12627887377747.

It is an arithmetic number, because the mean of its divisors is an integer number (12627887377747).

Almost surely, 2^{25255774755493} is an apocalyptic number.

It is an amenable number.

25255774755493 is a deficient number, since it is larger than the sum of its proper divisors (1).

25255774755493 is an equidigital number, since it uses as much as digits as its factorization.

25255774755493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1852200000, while the sum is 70.

The spelling of 25255774755493 in words is "twenty-five trillion, two hundred fifty-five billion, seven hundred seventy-four million, seven hundred fifty-five thousand, four hundred ninety-three".