6991386150 has 96 divisors (see below), whose sum is σ = 20220134400. Its totient is φ = 1598019360.

The previous prime is 6991386137. The next prime is 6991386173. The reversal of 6991386150 is 516831996.

It is a self number, because there is not a number n which added to its sum of digits gives 6991386150.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 16494 + ... + 119393.

It is an arithmetic number, because the mean of its divisors is an integer number (210626400).

Almost surely, 2^6991386150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6991386150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10110067200).

6991386150 is an abundant number, since it is smaller than the sum of its proper divisors (13228748250).

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

6991386150 is a wasteful number, since it uses less digits than its factorization.

6991386150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135923 (or 135904 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 6991386150 is about 83614.5092074336. The cubic root of 6991386150 is about 1912.1462082118.

The spelling of 6991386150 in words is "six billion, nine hundred ninety-one million, three hundred eighty-six thousand, one hundred fifty".