6443013481 has 4 divisors (see below), whose sum is σ = 6822014292. Its totient is φ = 6064012672.

The previous prime is 6443013427. The next prime is 6443013503. The reversal of 6443013481 is 1843103446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2692675881 + 3750337600 = 51891^2 + 61240^2 .

It is a cyclic number.

It is not a de Polignac number, because 6443013481 - 2¹¹ = 6443011433 is a prime.

It is a super-2 number, since 2×6443013481² = 83024845432695474722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6443013581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189500380 + ... + 189500413.

It is an arithmetic number, because the mean of its divisors is an integer number (1705503573).

Almost surely, 2^6443013481 is an apocalyptic number.

It is an amenable number.

6443013481 is a deficient number, since it is larger than the sum of its proper divisors (379000811).

6443013481 is a wasteful number, since it uses less digits than its factorization.

6443013481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379000810.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 6443013481 is about 80268.3840686979. The cubic root of 6443013481 is about 1860.7856434598.

The spelling of 6443013481 in words is "six billion, four hundred forty-three million, thirteen thousand, four hundred eighty-one".