6931216656 has 200 divisors, whose sum is σ = 24690822464. Its totient is φ = 1827982080.

The previous prime is 6931216651. The next prime is 6931216657. The reversal of 6931216656 is 6566121396.

It is not an unprimeable number, because it can be changed into a prime (6931216651) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 88551 + ... + 147321.

Almost surely, 2^6931216656 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 6931216656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12345411232).

6931216656 is an abundant number, since it is smaller than the sum of its proper divisors (17759605808).

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

6931216656 is a wasteful number, since it uses less digits than its factorization.

6931216656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58811 (or 58796 counting only the distinct ones).

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

The square root of 6931216656 is about 83253.9287721607. The cubic root of 6931216656 is about 1906.6449379455.

The spelling of 6931216656 in words is "six billion, nine hundred thirty-one million, two hundred sixteen thousand, six hundred fifty-six".