6399499080 has 128 divisors (see below), whose sum is σ = 21156347520. Its totient is φ = 1538611200.

The previous prime is 6399499031. The next prime is 6399499111. The reversal of 6399499080 is 809949936.

It is a self number, because there is not a number n which added to its sum of digits gives 6399499080.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19380 + ... + 114780.

It is an arithmetic number, because the mean of its divisors is an integer number (165283965).

Almost surely, 2^6399499080 is an apocalyptic number.

6399499080 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 6399499080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10578173760).

6399499080 is an abundant number, since it is smaller than the sum of its proper divisors (14756848440).

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

6399499080 is a wasteful number, since it uses less digits than its factorization.

6399499080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95471 (or 95467 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 57.

The square root of 6399499080 is about 79996.8691887376. The cubic root of 6399499080 is about 1856.5870933338.

The spelling of 6399499080 in words is "six billion, three hundred ninety-nine million, four hundred ninety-nine thousand, eighty".