6817897398144 has 64 divisors (see below), whose sum is σ = 20697188538240. Its totient is φ = 1947970684416.

The previous prime is 6817897398079. The next prime is 6817897398167. The reversal of 6817897398144 is 4418937987186.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1268207394 + ... + 1268212769.

It is an arithmetic number, because the mean of its divisors is an integer number (323393570910).

Almost surely, 2^{6817897398144} is an apocalyptic number.

6817897398144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6817897398144 is an abundant number, since it is smaller than the sum of its proper divisors (13879291140096).

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

6817897398144 is a wasteful number, since it uses less digits than its factorization.

6817897398144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536420187 (or 2536420175 counting only the distinct ones).

The product of its digits is 585252864, while the sum is 75.

The spelling of 6817897398144 in words is "six trillion, eight hundred seventeen billion, eight hundred ninety-seven million, three hundred ninety-eight thousand, one hundred forty-four".