8397198416840 has 32 divisors (see below), whose sum is σ = 19203429171960. Its totient is φ = 3303815769600.

The previous prime is 8397198416807. The next prime is 8397198416881. The reversal of 8397198416840 is 486148917938.

It can be written as a sum of positive squares in 4 ways, for example, as 3690095005444 + 4707103411396 = 1920962^2 + 2169586^2 .

It is a super-3 number, since 3×8397198416840³ (a number of 40 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1720734941 + ... + 1720739820.

Almost surely, 2^{8397198416840} is an apocalyptic number.

It is an amenable number.

8397198416840 is an abundant number, since it is smaller than the sum of its proper divisors (10806230755120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8397198416840 is a wasteful number, since it uses less digits than its factorization.

8397198416840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441474833 (or 3441474829 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 68.

The spelling of 8397198416840 in words is "eight trillion, three hundred ninety-seven billion, one hundred ninety-eight million, four hundred sixteen thousand, eight hundred forty".