6991288160 has 24 divisors (see below), whose sum is σ = 16516918656. Its totient is φ = 2796515200.

The previous prime is 6991288147. The next prime is 6991288169. The reversal of 6991288160 is 618821996.

It is a happy number.

It is a super-2 number, since 2×6991288160² = 97756220272312371200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6991288099 and 6991288108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991288169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21847616 + ... + 21847935.

It is an arithmetic number, because the mean of its divisors is an integer number (688204944).

Almost surely, 2^6991288160 is an apocalyptic number.

It is an amenable number.

6991288160 is an abundant number, since it is smaller than the sum of its proper divisors (9525630496).

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

6991288160 is a wasteful number, since it uses less digits than its factorization.

6991288160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43695566 (or 43695558 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 6991288160 is about 83613.9232424840. The cubic root of 6991288160 is about 1912.1372747386.

The spelling of 6991288160 in words is "six billion, nine hundred ninety-one million, two hundred eighty-eight thousand, one hundred sixty".