838208551109 has 2 divisors, whose sum is σ = 838208551110. Its totient is φ = 838208551108.

The previous prime is 838208551099. The next prime is 838208551163. The reversal of 838208551109 is 901155802838.

It is a happy number.

838208551109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 743944200484 + 94264350625 = 862522^2 + 307025^2 .

It is a cyclic number.

It is not a de Polignac number, because 838208551109 - 2⁸ = 838208550853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838208551309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419104275554 + 419104275555.

It is an arithmetic number, because the mean of its divisors is an integer number (419104275555).

Almost surely, 2^838208551109 is an apocalyptic number.

It is an amenable number.

838208551109 is a deficient number, since it is larger than the sum of its proper divisors (1).

838208551109 is an equidigital number, since it uses as much as digits as its factorization.

838208551109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 50.

The spelling of 838208551109 in words is "eight hundred thirty-eight billion, two hundred eight million, five hundred fifty-one thousand, one hundred nine".