25493797393 has 2 divisors, whose sum is σ = 25493797394. Its totient is φ = 25493797392.

The previous prime is 25493797331. The next prime is 25493797403. The reversal of 25493797393 is 39379739452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14960469969 + 10533327424 = 122313^2 + 102632^2 .

It is a cyclic number.

It is not a de Polignac number, because 25493797393 - 2²⁹ = 24956926481 is a prime.

It is not a weakly prime, because it can be changed into another prime (25493797093) 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, 12746898696 + 12746898697.

It is an arithmetic number, because the mean of its divisors is an integer number (12746898697).

Almost surely, 2^25493797393 is an apocalyptic number.

It is an amenable number.

25493797393 is a deficient number, since it is larger than the sum of its proper divisors (1).

25493797393 is an equidigital number, since it uses as much as digits as its factorization.

25493797393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38578680, while the sum is 61.

The spelling of 25493797393 in words is "twenty-five billion, four hundred ninety-three million, seven hundred ninety-seven thousand, three hundred ninety-three".