6216549156 has 72 divisors (see below), whose sum is σ = 16290630720. Its totient is φ = 1996456896.

The previous prime is 6216549083. The next prime is 6216549247. The reversal of 6216549156 is 6519456126.

6216549156 is a `hidden beast` number, since 621 + 6 + 5 + 4 + 9 + 15 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 502315 + ... + 514541.

It is an arithmetic number, because the mean of its divisors is an integer number (226258760).

Almost surely, 2^6216549156 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 6216549156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8145315360).

6216549156 is an abundant number, since it is smaller than the sum of its proper divisors (10074081564).

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

6216549156 is a wasteful number, since it uses less digits than its factorization.

6216549156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12753 (or 12748 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 6216549156 is about 78845.0959540287. The cubic root of 6216549156 is about 1838.7236300149.

The spelling of 6216549156 in words is "six billion, two hundred sixteen million, five hundred forty-nine thousand, one hundred fifty-six".