803816618309 has 2 divisors, whose sum is σ = 803816618310. Its totient is φ = 803816618308.

The previous prime is 803816618303. The next prime is 803816618351. The reversal of 803816618309 is 903816618308.

It is a happy number.

803816618309 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., 802642185409 + 1174432900 = 895903^2 + 34270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-803816618309 is a prime.

It is a super-2 number, since 2×803816618309² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (803816618303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401908309154 + 401908309155.

It is an arithmetic number, because the mean of its divisors is an integer number (401908309155).

Almost surely, 2^803816618309 is an apocalyptic number.

It is an amenable number.

803816618309 is a deficient number, since it is larger than the sum of its proper divisors (1).

803816618309 is an equidigital number, since it uses as much as digits as its factorization.

803816618309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 53.

Subtracting 803816618309 from its reverse (903816618308), we obtain a palindrome (99999999999).

The spelling of 803816618309 in words is "eight hundred three billion, eight hundred sixteen million, six hundred eighteen thousand, three hundred nine".