6440116080 has 160 divisors (see below), whose sum is σ = 20858664960. Its totient is φ = 1641784320.

The previous prime is 6440116051. The next prime is 6440116091. The reversal of 6440116080 is 806110446.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 612306 + ... + 622734.

It is an arithmetic number, because the mean of its divisors is an integer number (130366656).

Almost surely, 2^6440116080 is an apocalyptic number.

6440116080 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 6440116080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10429332480).

6440116080 is an abundant number, since it is smaller than the sum of its proper divisors (14418548880).

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

6440116080 is a wasteful number, since it uses less digits than its factorization.

6440116080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10559 (or 10553 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 6440116080 is about 80250.3338310814. Note that the first 3 decimals coincide. The cubic root of 6440116080 is about 1860.5066720037.

The spelling of 6440116080 in words is "six billion, four hundred forty million, one hundred sixteen thousand, eighty".