6891499144320 has 512 divisors, whose sum is σ = 26965405440000. Its totient is φ = 1492291842048.

The previous prime is 6891499144289. The next prime is 6891499144333. The reversal of 6891499144320 is 234419941986.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12237259 + ... + 12788021.

It is an arithmetic number, because the mean of its divisors is an integer number (52666807500).

Almost surely, 2^{6891499144320} is an apocalyptic number.

6891499144320 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 6891499144320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13482702720000).

6891499144320 is an abundant number, since it is smaller than the sum of its proper divisors (20073906295680).

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

6891499144320 is a wasteful number, since it uses less digits than its factorization.

6891499144320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550825 (or 550799 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 60.

The spelling of 6891499144320 in words is "six trillion, eight hundred ninety-one billion, four hundred ninety-nine million, one hundred forty-four thousand, three hundred twenty".