25783143493 has 2 divisors, whose sum is σ = 25783143494. Its totient is φ = 25783143492.

The previous prime is 25783143467. The next prime is 25783143511. The reversal of 25783143493 is 39434138752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19367453889 + 6415689604 = 139167^2 + 80098^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25783143493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25783143413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12891571746 + 12891571747.

It is an arithmetic number, because the mean of its divisors is an integer number (12891571747).

Almost surely, 2^25783143493 is an apocalyptic number.

It is an amenable number.

25783143493 is a deficient number, since it is larger than the sum of its proper divisors (1).

25783143493 is an equidigital number, since it uses as much as digits as its factorization.

25783143493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 49.

The spelling of 25783143493 in words is "twenty-five billion, seven hundred eighty-three million, one hundred forty-three thousand, four hundred ninety-three".