5991056640 has 432 divisors, whose sum is σ = 21810297600. Its totient is φ = 1516290048.

The previous prime is 5991056597. The next prime is 5991056681. The reversal of 5991056640 is 466501995.

It is a happy number.

5991056640 is a `hidden beast` number, since 599 + 1 + 0 + 56 + 6 + 4 + 0 = 666.

It is a super-3 number, since 3×5991056640³ (a number of 30 digits) contains 333 as substring.

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

It is a congruent number.

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, 26392207 + ... + 26392433.

It is an arithmetic number, because the mean of its divisors is an integer number (50486800).

Almost surely, 2^5991056640 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 5991056640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10905148800).

5991056640 is an abundant number, since it is smaller than the sum of its proper divisors (15819240960).

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

5991056640 is a wasteful number, since it uses less digits than its factorization.

5991056640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 5991056640 is about 77401.9162553486. The cubic root of 5991056640 is about 1816.2173014564.

The spelling of 5991056640 in words is "five billion, nine hundred ninety-one million, fifty-six thousand, six hundred forty".