5991998464 has 99 divisors (see below), whose sum is σ = 12489039721. Its totient is φ = 2873384960.

The previous prime is 5991998437. The next prime is 5991998477. The reversal of 5991998464 is 4648991995.

The square root of 5991998464 is 77408.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 288728064 + 5703270400 = 16992^2 + 75520^2 .

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5991998396 and 5991998405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 101559267 + ... + 101559325.

Almost surely, 2^5991998464 is an apocalyptic number.

5991998464 is the 77408-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5991998464

5991998464 is an abundant number, since it is smaller than the sum of its proper divisors (6497041257).

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

5991998464 is an frugal number, since it uses more digits than its factorization.

5991998464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 102 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 64.

The cubic root of 5991998464 is about 1816.3124692773.

Multiplying 5991998464 by its sum of digits (64), we get a square (383487901696 = 619264²).

5991998464 divided by its sum of digits (64) gives a square (93624976 = 9676²).

The spelling of 5991998464 in words is "five billion, nine hundred ninety-one million, nine hundred ninety-eight thousand, four hundred sixty-four".