6921691945152 has 112 divisors (see below), whose sum is σ = 18374281991520. Its totient is φ = 2299601829888.

The previous prime is 6921691945109. The next prime is 6921691945171. The reversal of 6921691945152 is 2515491961296.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84175674 + ... + 84257862.

It is an arithmetic number, because the mean of its divisors is an integer number (164056089210).

Almost surely, 2^{6921691945152} 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 6921691945152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9187140995760).

6921691945152 is an abundant number, since it is smaller than the sum of its proper divisors (11452590046368).

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

6921691945152 is a wasteful number, since it uses less digits than its factorization.

6921691945152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83650 (or 83640 counting only the distinct ones).

The product of its digits is 10497600, while the sum is 60.

The spelling of 6921691945152 in words is "six trillion, nine hundred twenty-one billion, six hundred ninety-one million, nine hundred forty-five thousand, one hundred fifty-two".