5591427840 has 576 divisors, whose sum is σ = 21757317120. Its totient is φ = 1353646080.

The previous prime is 5591427839. The next prime is 5591427847. The reversal of 5591427840 is 487241955.

5591427840 is a `hidden beast` number, since 559 + 14 + 2 + 7 + 84 + 0 = 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 (5591427847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18212967 + ... + 18213273.

It is an arithmetic number, because the mean of its divisors is an integer number (37773120).

Almost surely, 2^5591427840 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 5591427840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10878658560).

5591427840 is an abundant number, since it is smaller than the sum of its proper divisors (16165889280).

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

5591427840 is a wasteful number, since it uses less digits than its factorization.

5591427840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 5591427840 is about 74775.8506471173. The cubic root of 5591427840 is about 1774.9014389497.

The spelling of 5591427840 in words is "five billion, five hundred ninety-one million, four hundred twenty-seven thousand, eight hundred forty".