6931313844 has 96 divisors (see below), whose sum is σ = 19946465280. Its totient is φ = 1824259968.

The previous prime is 6931313843. The next prime is 6931313897. The reversal of 6931313844 is 4483131396.

It is a super-2 number, since 2×6931313844² = 96086223208052112672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 6931313796 and 6931313805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6931313843) 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 31 ways as a sum of consecutive naturals, for example, 542967 + ... + 555585.

It is an arithmetic number, because the mean of its divisors is an integer number (207775680).

Almost surely, 2^6931313844 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 6931313844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9973232640).

6931313844 is an abundant number, since it is smaller than the sum of its proper divisors (13015151436).

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

6931313844 is a wasteful number, since it uses less digits than its factorization.

6931313844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13149 (or 13147 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 6931313844 is about 83254.5124542808. The cubic root of 6931313844 is about 1906.6538494229.

The spelling of 6931313844 in words is "six billion, nine hundred thirty-one million, three hundred thirteen thousand, eight hundred forty-four".