6343216645 has 16 divisors (see below), whose sum is σ = 7646296320. Its totient is φ = 5051660800.

The previous prime is 6343216601. The next prime is 6343216669. The reversal of 6343216645 is 5466123436.

It is a happy number.

It is not a de Polignac number, because 6343216645 - 2²³ = 6334828037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6343216598 and 6343216607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1442400 + ... + 1446790.

It is an arithmetic number, because the mean of its divisors is an integer number (477893520).

Almost surely, 2^6343216645 is an apocalyptic number.

It is an amenable number.

6343216645 is a deficient number, since it is larger than the sum of its proper divisors (1303079675).

6343216645 is a wasteful number, since it uses less digits than its factorization.

6343216645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5636.

The product of its digits is 311040, while the sum is 40.

The square root of 6343216645 is about 79644.3133249324. The cubic root of 6343216645 is about 1851.1282764422.

The spelling of 6343216645 in words is "six billion, three hundred forty-three million, two hundred sixteen thousand, six hundred forty-five".