4320561643 has 8 divisors (see below), whose sum is σ = 4419633456. Its totient is φ = 4222140000.

The previous prime is 4320561613. The next prime is 4320561649. The reversal of 4320561643 is 3461650234.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4320561643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4320561599 and 4320561608.

It is not an unprimeable number, because it can be changed into a prime (4320561649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149088 + ... + 175693.

It is an arithmetic number, because the mean of its divisors is an integer number (552454182).

Almost surely, 2^4320561643 is an apocalyptic number.

4320561643 is a deficient number, since it is larger than the sum of its proper divisors (99071813).

4320561643 is a wasteful number, since it uses less digits than its factorization.

4320561643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325085.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 4320561643 is about 65730.9793248207. The cubic root of 4320561643 is about 1628.7211471602.

The spelling of 4320561643 in words is "four billion, three hundred twenty million, five hundred sixty-one thousand, six hundred forty-three".