25305255502493 has 2 divisors, whose sum is σ = 25305255502494. Its totient is φ = 25305255502492.

The previous prime is 25305255502489. The next prime is 25305255502511. The reversal of 25305255502493 is 39420555250352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18328356632569 + 6976898869924 = 4281163^2 + 2641382^2 .

It is a cyclic number.

It is not a de Polignac number, because 25305255502493 - 2² = 25305255502489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25305255502463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12652627751246 + 12652627751247.

It is an arithmetic number, because the mean of its divisors is an integer number (12652627751247).

Almost surely, 2^{25305255502493} is an apocalyptic number.

It is an amenable number.

25305255502493 is a deficient number, since it is larger than the sum of its proper divisors (1).

25305255502493 is an equidigital number, since it uses as much as digits as its factorization.

25305255502493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100000, while the sum is 50.

The spelling of 25305255502493 in words is "twenty-five trillion, three hundred five billion, two hundred fifty-five million, five hundred two thousand, four hundred ninety-three".