6722120538840 has 128 divisors (see below), whose sum is σ = 23842003968000. Its totient is φ = 1483502458368.

The previous prime is 6722120538829. The next prime is 6722120538857. The reversal of 6722120538840 is 488350212276.

It is a super-3 number, since 3×6722120538840³ (a number of 39 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6722120538840.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 137950200 + ... + 137998919.

It is an arithmetic number, because the mean of its divisors is an integer number (186265656000).

Almost surely, 2^{6722120538840} is an apocalyptic number.

6722120538840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6722120538840 is an abundant number, since it is smaller than the sum of its proper divisors (17119883429160).

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

6722120538840 is a wasteful number, since it uses less digits than its factorization.

6722120538840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275949169 (or 275949165 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 6722120538840 in words is "six trillion, seven hundred twenty-two billion, one hundred twenty million, five hundred thirty-eight thousand, eight hundred forty".