6489901800 has 144 divisors (see below), whose sum is σ = 21820032000. Its totient is φ = 1728673920.

The previous prime is 6489901783. The next prime is 6489901811. The reversal of 6489901800 is 81099846.

6489901800 is a `hidden beast` number, since 6 + 489 + 90 + 1 + 80 + 0 = 666.

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

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 2300791 + ... + 2303609.

It is an arithmetic number, because the mean of its divisors is an integer number (151528000).

Almost surely, 2^6489901800 is an apocalyptic number.

6489901800 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6489901800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10910016000).

6489901800 is an abundant number, since it is smaller than the sum of its proper divisors (15330130200).

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

6489901800 is a wasteful number, since it uses less digits than its factorization.

6489901800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4120 (or 4108 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 6489901800 is about 80559.9267626281. The cubic root of 6489901800 is about 1865.2886250782.

The spelling of 6489901800 in words is "six billion, four hundred eighty-nine million, nine hundred one thousand, eight hundred".