6345488721 has 32 divisors (see below), whose sum is σ = 10038268800. Its totient is φ = 3514752000.

The previous prime is 6345488713. The next prime is 6345488741. The reversal of 6345488721 is 1278845436.

It is not a de Polignac number, because 6345488721 - 2³ = 6345488713 is a prime.

It is a super-4 number, since 4×6345488721⁴ (a number of 40 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is not an unprimeable number, because it can be changed into a prime (6345488741) 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 31 ways as a sum of consecutive naturals, for example, 29896 + ... + 116553.

It is an arithmetic number, because the mean of its divisors is an integer number (313695900).

Almost surely, 2^6345488721 is an apocalyptic number.

It is an amenable number.

6345488721 is a deficient number, since it is larger than the sum of its proper divisors (3692780079).

6345488721 is a wasteful number, since it uses less digits than its factorization.

6345488721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146577.

The product of its digits is 1290240, while the sum is 48.

The square root of 6345488721 is about 79658.5759413260. The cubic root of 6345488721 is about 1851.3492685295.

The spelling of 6345488721 in words is "six billion, three hundred forty-five million, four hundred eighty-eight thousand, seven hundred twenty-one".