6389730561 has 8 divisors (see below), whose sum is σ = 8520304864. Its totient is φ = 4259488320.

The previous prime is 6389730491. The next prime is 6389730569. The reversal of 6389730561 is 1650379836.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6389730561 - 2⁷ = 6389730433 is a prime.

It is a super-3 number, since 3×6389730561³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6389730561.

It is not an unprimeable number, because it can be changed into a prime (6389730569) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 33976 + ... + 118041.

It is an arithmetic number, because the mean of its divisors is an integer number (1065038108).

Almost surely, 2^6389730561 is an apocalyptic number.

It is an amenable number.

6389730561 is a deficient number, since it is larger than the sum of its proper divisors (2130574303).

6389730561 is a wasteful number, since it uses less digits than its factorization.

6389730561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166031.

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 6389730561 is about 79935.7902381655. The cubic root of 6389730561 is about 1855.6419494583.

The spelling of 6389730561 in words is "six billion, three hundred eighty-nine million, seven hundred thirty thousand, five hundred sixty-one".