5825394985721 has 2 divisors, whose sum is σ = 5825394985722. Its totient is φ = 5825394985720.

The previous prime is 5825394985643. The next prime is 5825394985723. The reversal of 5825394985721 is 1275894935285.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4612894495225 + 1212500490496 = 2147765^2 + 1101136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5825394985721 is a prime.

Together with 5825394985723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5825394985723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2912697492860 + 2912697492861.

It is an arithmetic number, because the mean of its divisors is an integer number (2912697492861).

Almost surely, 2^{5825394985721} is an apocalyptic number.

It is an amenable number.

5825394985721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5825394985721 is an equidigital number, since it uses as much as digits as its factorization.

5825394985721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728000, while the sum is 68.

The spelling of 5825394985721 in words is "five trillion, eight hundred twenty-five billion, three hundred ninety-four million, nine hundred eighty-five thousand, seven hundred twenty-one".