5511939840 has 576 divisors, whose sum is σ = 21721996800. Its totient is φ = 1328762880.

The previous prime is 5511939803. The next prime is 5511939847. The reversal of 5511939840 is 489391155.

5511939840 is a `hidden beast` number, since 5 + 511 + 9 + 3 + 98 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5511939847) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30792871 + ... + 30793049.

It is an arithmetic number, because the mean of its divisors is an integer number (37711800).

Almost surely, 2^5511939840 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 5511939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10860998400).

5511939840 is an abundant number, since it is smaller than the sum of its proper divisors (16210056960).

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

5511939840 is an equidigital number, since it uses as much as digits as its factorization.

5511939840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 5511939840 is about 74242.4396150881. The cubic root of 5511939840 is about 1766.4505715673.

The spelling of 5511939840 in words is "five billion, five hundred eleven million, nine hundred thirty-nine thousand, eight hundred forty".