25321995935393 has 2 divisors, whose sum is σ = 25321995935394. Its totient is φ = 25321995935392.

The previous prime is 25321995935359. The next prime is 25321995935419. The reversal of 25321995935393 is 39353959912352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21103108691344 + 4218887244049 = 4593812^2 + 2053993^2 .

It is a cyclic number.

It is not a de Polignac number, because 25321995935393 - 2⁴² = 20923949424289 is a prime.

It is a super-2 number, since 2×25321995935393² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25321995935993) 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, 12660997967696 + 12660997967697.

It is an arithmetic number, because the mean of its divisors is an integer number (12660997967697).

Almost surely, 2^{25321995935393} is an apocalyptic number.

It is an amenable number.

25321995935393 is a deficient number, since it is larger than the sum of its proper divisors (1).

25321995935393 is an equidigital number, since it uses as much as digits as its factorization.

25321995935393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 265720500, while the sum is 68.

The spelling of 25321995935393 in words is "twenty-five trillion, three hundred twenty-one billion, nine hundred ninety-five million, nine hundred thirty-five thousand, three hundred ninety-three".