618820557444829 has 2 divisors, whose sum is σ = 618820557444830. Its totient is φ = 618820557444828.

The previous prime is 618820557444787. The next prime is 618820557444907. The reversal of 618820557444829 is 928444755028816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 618775475539204 + 45081905625 = 24875198^2 + 212325^2 .

It is a cyclic number.

It is not a de Polignac number, because 618820557444829 - 2¹⁷ = 618820557313757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618820557444329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309410278722414 + 309410278722415.

It is an arithmetic number, because the mean of its divisors is an integer number (309410278722415).

Almost surely, 2^{618820557444829} is an apocalyptic number.

It is an amenable number.

618820557444829 is a deficient number, since it is larger than the sum of its proper divisors (1).

618820557444829 is an equidigital number, since it uses as much as digits as its factorization.

618820557444829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1238630400, while the sum is 73.

The spelling of 618820557444829 in words is "six hundred eighteen trillion, eight hundred twenty billion, five hundred fifty-seven million, four hundred forty-four thousand, eight hundred twenty-nine".