5820801781 has 2 divisors, whose sum is σ = 5820801782. Its totient is φ = 5820801780.

The previous prime is 5820801761. The next prime is 5820801799. The reversal of 5820801781 is 1871080285.

5820801781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4551661156 + 1269140625 = 67466^2 + 35625^2 .

It is a cyclic number.

It is not a de Polignac number, because 5820801781 - 2⁷ = 5820801653 is a prime.

It is a super-2 number, since 2×5820801781² = 67763466747385543922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5820801761) 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, 2910400890 + 2910400891.

It is an arithmetic number, because the mean of its divisors is an integer number (2910400891).

Almost surely, 2^5820801781 is an apocalyptic number.

It is an amenable number.

5820801781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5820801781 is an equidigital number, since it uses as much as digits as its factorization.

5820801781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 40.

The square root of 5820801781 is about 76294.1792078531. The cubic root of 5820801781 is about 1798.8471816858.

The spelling of 5820801781 in words is "five billion, eight hundred twenty million, eight hundred one thousand, seven hundred eighty-one".