6991774944 has 192 divisors, whose sum is σ = 23074232832. Its totient is φ = 1815813120.

The previous prime is 6991774903. The next prime is 6991774949. The reversal of 6991774944 is 4494771996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991774949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 890524 + ... + 898340.

It is an arithmetic number, because the mean of its divisors is an integer number (120178296).

Almost surely, 2^6991774944 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 6991774944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11537116416).

6991774944 is an abundant number, since it is smaller than the sum of its proper divisors (16082457888).

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

6991774944 is a wasteful number, since it uses less digits than its factorization.

6991774944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7870 (or 7840 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 60.

The square root of 6991774944 is about 83616.8340945769. The cubic root of 6991774944 is about 1912.1816526467.

The spelling of 6991774944 in words is "six billion, nine hundred ninety-one million, seven hundred seventy-four thousand, nine hundred forty-four".