6556311916 has 144 divisors (see below), whose sum is σ = 14936219200. Its totient is φ = 2514758400.

The previous prime is 6556311913. The next prime is 6556311997. The reversal of 6556311916 is 6191136556.

It is not an unprimeable number, because it can be changed into a prime (6556311911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12118606 + ... + 12119146.

Almost surely, 2^6556311916 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 6556311916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7468109600).

6556311916 is an abundant number, since it is smaller than the sum of its proper divisors (8379907284).

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

6556311916 is a wasteful number, since it uses less digits than its factorization.

6556311916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 634 counting only the distinct ones).

The product of its digits is 145800, while the sum is 43.

The square root of 6556311916 is about 80971.0560385623. The cubic root of 6556311916 is about 1871.6294448051.

The spelling of 6556311916 in words is "six billion, five hundred fifty-six million, three hundred eleven thousand, nine hundred sixteen".