6921699377180 has 192 divisors, whose sum is σ = 18039594639360. Its totient is φ = 2177671412736.

The previous prime is 6921699377167. The next prime is 6921699377213. The reversal of 6921699377180 is 817739961296.

It is a self number, because there is not a number n which added to its sum of digits gives 6921699377180.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21789974 + ... + 22105346.

It is an arithmetic number, because the mean of its divisors is an integer number (93956222080).

Almost surely, 2^{6921699377180} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6921699377180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9019797319680).

6921699377180 is an abundant number, since it is smaller than the sum of its proper divisors (11117895262180).

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

6921699377180 is a wasteful number, since it uses less digits than its factorization.

6921699377180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315668 (or 315666 counting only the distinct ones).

The product of its (nonzero) digits is 61725888, while the sum is 68.

The spelling of 6921699377180 in words is "six trillion, nine hundred twenty-one billion, six hundred ninety-nine million, three hundred seventy-seven thousand, one hundred eighty".