6921154348680 has 768 divisors, whose sum is σ = 25327442568960. Its totient is φ = 1491499008000.

The previous prime is 6921154348663. The next prime is 6921154348687. The reversal of 6921154348680 is 868434511296.

It is a self number, because there is not a number n which added to its sum of digits gives 6921154348680.

It is not an unprimeable number, because it can be changed into a prime (6921154348687) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2372694582 + ... + 2372697498.

It is an arithmetic number, because the mean of its divisors is an integer number (32978440845).

Almost surely, 2^{6921154348680} is an apocalyptic number.

6921154348680 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 6921154348680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12663721284480).

6921154348680 is an abundant number, since it is smaller than the sum of its proper divisors (18406288220280).

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

6921154348680 is a wasteful number, since it uses less digits than its factorization.

6921154348680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130 (or 3089 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 6921154348680 in words is "six trillion, nine hundred twenty-one billion, one hundred fifty-four million, three hundred forty-eight thousand, six hundred eighty".