6839991273990 has 128 divisors (see below), whose sum is σ = 18930095953920. Its totient is φ = 1549349480448.

The previous prime is 6839991273967. The next prime is 6839991273991. The reversal of 6839991273990 is 993721999386.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6839991273991) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 184055031 + ... + 184092189.

It is an arithmetic number, because the mean of its divisors is an integer number (147891374640).

Almost surely, 2^{6839991273990} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6839991273990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9465047976960).

6839991273990 is an abundant number, since it is smaller than the sum of its proper divisors (12090104679930).

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

6839991273990 is a wasteful number, since it uses less digits than its factorization.

6839991273990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45046.

The product of its (nonzero) digits is 357128352, while the sum is 75.

The spelling of 6839991273990 in words is "six trillion, eight hundred thirty-nine billion, nine hundred ninety-one million, two hundred seventy-three thousand, nine hundred ninety".