5611644720 has 240 divisors, whose sum is σ = 20694559392. Its totient is φ = 1351434240.

The previous prime is 5611644713. The next prime is 5611644761. The reversal of 5611644720 is 274461165.

5611644720 is a `hidden beast` number, since 5 + 6 + 1 + 1 + 644 + 7 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1241184 + ... + 1245696.

Almost surely, 2^5611644720 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 5611644720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10347279696).

5611644720 is an abundant number, since it is smaller than the sum of its proper divisors (15082914672).

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

5611644720 is a wasteful number, since it uses less digits than its factorization.

5611644720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700 (or 4691 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 5611644720 is about 74910.9118887229. The cubic root of 5611644720 is about 1777.0380314765.

The spelling of 5611644720 in words is "five billion, six hundred eleven million, six hundred forty-four thousand, seven hundred twenty".