6418404370849 has 9 divisors (see below), whose sum is σ = 6454522220601. Its totient is φ = 6382487550960.

The previous prime is 6418404370801. The next prime is 6418404370877. The reversal of 6418404370849 is 9480734048146.

It is a happy number.

The square root of 6418404370849 is 2533457.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2622796445025 + 3795607925824 = 1619505^2 + 1948232^2 .

It is not a de Polignac number, because 6418404370849 - 2¹⁷ = 6418404239777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6418404370793 and 6418404370802.

It is not an unprimeable number, because it can be changed into a prime (6418404370949) 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 in 8 ways as a sum of consecutive naturals, for example, 458548719 + ... + 458562715.

Almost surely, 2^{6418404370849} is an apocalyptic number.

6418404370849 is the 2533457-th square number.

6418404370849 is the 1266729-th centered octagonal number.

It is an amenable number.

6418404370849 is a deficient number, since it is larger than the sum of its proper divisors (36117849752).

6418404370849 is an frugal number, since it uses more digits than its factorization.

6418404370849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28356 (or 14178 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 58.

The spelling of 6418404370849 in words is "six trillion, four hundred eighteen billion, four hundred four million, three hundred seventy thousand, eight hundred forty-nine".