6481213144 has 96 divisors (see below), whose sum is σ = 15287071680. Its totient is φ = 2558524416.

The previous prime is 6481213133. The next prime is 6481213169. The reversal of 6481213144 is 4413121846.

It is a super-2 number, since 2×6481213144² = 84012247635916729472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 302862 + ... + 323554.

It is an arithmetic number, because the mean of its divisors is an integer number (159240330).

Almost surely, 2^6481213144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6481213144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7643535840).

6481213144 is an abundant number, since it is smaller than the sum of its proper divisors (8805858536).

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

6481213144 is a wasteful number, since it uses less digits than its factorization.

6481213144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20777 (or 20766 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 6481213144 is about 80505.9820386038. The cubic root of 6481213144 is about 1864.4558395371.

The spelling of 6481213144 in words is "six billion, four hundred eighty-one million, two hundred thirteen thousand, one hundred forty-four".