8420815403369 has 2 divisors, whose sum is σ = 8420815403370. Its totient is φ = 8420815403368.

The previous prime is 8420815403317. The next prime is 8420815403419. The reversal of 8420815403369 is 9633045180248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7606150305625 + 814665097744 = 2757925^2 + 902588^2 .

It is a cyclic number.

It is not a de Polignac number, because 8420815403369 - 2²⁴ = 8420798626153 is a prime.

It is a super-2 number, since 2×8420815403369² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8420815403369.

It is not a weakly prime, because it can be changed into another prime (8420815403669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210407701684 + 4210407701685.

It is an arithmetic number, because the mean of its divisors is an integer number (4210407701685).

Almost surely, 2^{8420815403369} is an apocalyptic number.

It is an amenable number.

8420815403369 is a deficient number, since it is larger than the sum of its proper divisors (1).

8420815403369 is an equidigital number, since it uses as much as digits as its factorization.

8420815403369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 8420815403369 in words is "eight trillion, four hundred twenty billion, eight hundred fifteen million, four hundred three thousand, three hundred sixty-nine".