6396535111680 has 1824 divisors, whose sum is σ = 27847441090560. Its totient is φ = 1375941427200.

The previous prime is 6396535111667. The next prime is 6396535111711. The reversal of 6396535111680 is 861115356936.

6396535111680 is a `hidden beast` number, since 6 + 3 + 9 + 6 + 535 + 11 + 16 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (1824).

It is a super-2 number, since 2×6396535111680² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 42361159605 + ... + 42361159755.

It is an arithmetic number, because the mean of its divisors is an integer number (15267237440).

Almost surely, 2^{6396535111680} is an apocalyptic number.

6396535111680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6396535111680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13923720545280).

6396535111680 is an abundant number, since it is smaller than the sum of its proper divisors (21450905978880).

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

6396535111680 is an frugal number, since it uses more digits than its factorization.

6396535111680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 6396535111680 in words is "six trillion, three hundred ninety-six billion, five hundred thirty-five million, one hundred eleven thousand, six hundred eighty".