6991488000 has 1056 divisors, whose sum is σ = 31371175680. Its totient is φ = 1504051200.

The previous prime is 6991487917. The next prime is 6991488011. The reversal of 6991488000 is 8841996.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 411263992 + ... + 411264008.

Almost surely, 2^6991488000 is an apocalyptic number.

6991488000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6991488000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15685587840).

6991488000 is an abundant number, since it is smaller than the sum of its proper divisors (24379687680).

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

6991488000 is a wasteful number, since it uses less digits than its factorization.

6991488000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 6991488000 is about 83615.1182502303. The cubic root of 6991488000 is about 1912.1554935019.

The spelling of 6991488000 in words is "six billion, nine hundred ninety-one million, four hundred eighty-eight thousand".