6443139120 has 160 divisors (see below), whose sum is σ = 21861100800. Its totient is φ = 1556843520.

The previous prime is 6443139103. The next prime is 6443139137. The reversal of 6443139120 is 219313446.

It is an interprime number because it is at equal distance from previous prime (6443139103) and next prime (6443139137).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 833031 + ... + 840729.

It is an arithmetic number, because the mean of its divisors is an integer number (136631880).

Almost surely, 2^6443139120 is an apocalyptic number.

6443139120 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 6443139120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10930550400).

6443139120 is an abundant number, since it is smaller than the sum of its proper divisors (15417961680).

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

6443139120 is a wasteful number, since it uses less digits than its factorization.

6443139120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8043 (or 8037 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 6443139120 is about 80269.1666831044. The cubic root of 6443139120 is about 1860.7977385107.

The spelling of 6443139120 in words is "six billion, four hundred forty-three million, one hundred thirty-nine thousand, one hundred twenty".