6549774336 has 420 divisors, whose sum is σ = 22669058802. Its totient is φ = 1820786688.

The previous prime is 6549774317. The next prime is 6549774349. The reversal of 6549774336 is 6334779456.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4337012736 + 2212761600 = 65856^2 + 47040^2 .

Its product of digits (11430720) is a multiple of the sum of its prime divisors (49).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 177020910 + ... + 177020946.

Almost surely, 2^6549774336 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 6549774336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11334529401).

6549774336 is an abundant number, since it is smaller than the sum of its proper divisors (16119284466).

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

6549774336 is an frugal number, since it uses more digits than its factorization.

6549774336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 49 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 54.

The square root of 6549774336 is about 80930.6761123370. The cubic root of 6549774336 is about 1871.0071439025.

The spelling of 6549774336 in words is "six billion, five hundred forty-nine million, seven hundred seventy-four thousand, three hundred thirty-six".