25795277993 has 2 divisors, whose sum is σ = 25795277994. Its totient is φ = 25795277992.

The previous prime is 25795277953. The next prime is 25795277999. The reversal of 25795277993 is 39977259752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25634571664 + 160706329 = 160108^2 + 12677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25795277993 is a prime.

It is not a weakly prime, because it can be changed into another prime (25795277999) 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, 12897638996 + 12897638997.

It is an arithmetic number, because the mean of its divisors is an integer number (12897638997).

Almost surely, 2^25795277993 is an apocalyptic number.

It is an amenable number.

25795277993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25795277993 is an equidigital number, since it uses as much as digits as its factorization.

25795277993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75014100, while the sum is 65.

The spelling of 25795277993 in words is "twenty-five billion, seven hundred ninety-five million, two hundred seventy-seven thousand, nine hundred ninety-three".