5611333644 has 216 divisors, whose sum is σ = 17584869120. Its totient is φ = 1532548512.

The previous prime is 5611333577. The next prime is 5611333649. The reversal of 5611333644 is 4463331165.

5611333644 is a `hidden beast` number, since 5 + 6 + 1 + 1 + 3 + 3 + 3 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 5611333599 and 5611333608.

It is not an unprimeable number, because it can be changed into a prime (5611333649) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3598537 + ... + 3600095.

Almost surely, 2^5611333644 is an apocalyptic number.

5611333644 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5611333644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8792434560).

5611333644 is an abundant number, since it is smaller than the sum of its proper divisors (11973535476).

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

5611333644 is a wasteful number, since it uses less digits than its factorization.

5611333644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1594 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 5611333644 is about 74908.8355536248. The cubic root of 5611333644 is about 1777.0051947519.

The spelling of 5611333644 in words is "five billion, six hundred eleven million, three hundred thirty-three thousand, six hundred forty-four".