6891428948928 has 112 divisors (see below), whose sum is σ = 18451104051744. Its totient is φ = 2269899141120.

The previous prime is 6891428948923. The next prime is 6891428949019. The reversal of 6891428948928 is 8298498241986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6891428948923) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4824526 + ... + 6087602.

It is an arithmetic number, because the mean of its divisors is an integer number (164742000462).

Almost surely, 2^{6891428948928} 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 6891428948928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9225552025872).

6891428948928 is an abundant number, since it is smaller than the sum of its proper divisors (11559675102816).

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

6891428948928 is a wasteful number, since it uses less digits than its factorization.

6891428948928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263430 (or 1263420 counting only the distinct ones).

The product of its digits is 1146617856, while the sum is 78.

The spelling of 6891428948928 in words is "six trillion, eight hundred ninety-one billion, four hundred twenty-eight million, nine hundred forty-eight thousand, nine hundred twenty-eight".