6921075855104 has 144 divisors (see below), whose sum is σ = 14244501096000. Its totient is φ = 3353748406272.

The previous prime is 6921075855061. The next prime is 6921075855107. The reversal of 6921075855104 is 4015585701296.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6921075855107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4947158597 + ... + 4947159995.

It is an arithmetic number, because the mean of its divisors is an integer number (98920146500).

Almost surely, 2^{6921075855104} is an apocalyptic number.

6921075855104 is a gapful number since it is divisible by the number (64) 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 6921075855104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7122250548000).

6921075855104 is an abundant number, since it is smaller than the sum of its proper divisors (7323425240896).

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

6921075855104 is a wasteful number, since it uses less digits than its factorization.

6921075855104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138 (or 3124 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 53.

The spelling of 6921075855104 in words is "six trillion, nine hundred twenty-one billion, seventy-five million, eight hundred fifty-five thousand, one hundred four".