6991045632 has 176 divisors, whose sum is σ = 20798830080. Its totient is φ = 2319704064.

The previous prime is 6991045619. The next prime is 6991045679. The reversal of 6991045632 is 2365401996.

6991045632 is a `hidden beast` number, since 6 + 9 + 9 + 1 + 0 + 4 + 5 + 632 = 666.

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 15 ways as a sum of consecutive naturals, for example, 8100433 + ... + 8101295.

Almost surely, 2^6991045632 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 6991045632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10399415040).

6991045632 is an abundant number, since it is smaller than the sum of its proper divisors (13807784448).

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

6991045632 is a wasteful number, since it uses less digits than its factorization.

6991045632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185 (or 1161 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 6991045632 is about 83612.4729451294. The cubic root of 6991045632 is about 1912.1151637828.

The spelling of 6991045632 in words is "six billion, nine hundred ninety-one million, forty-five thousand, six hundred thirty-two".