2643561323 has 8 divisors (see below), whose sum is σ = 2945082000. Its totient is φ = 2356064928.

The previous prime is 2643561317. The next prime is 2643561359. The reversal of 2643561323 is 3231653462.

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

It is a cyclic number.

It is not a de Polignac number, because 2643561323 - 2¹² = 2643557227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2643564323) 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, 3505673 + ... + 3506426.

It is an arithmetic number, because the mean of its divisors is an integer number (368135250).

Almost surely, 2^2643561323 is an apocalyptic number.

2643561323 is a deficient number, since it is larger than the sum of its proper divisors (301520677).

2643561323 is a wasteful number, since it uses less digits than its factorization.

2643561323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7012141.

The product of its digits is 77760, while the sum is 35.

The square root of 2643561323 is about 51415.5747123379. The cubic root of 2643561323 is about 1382.7058376987.

The spelling of 2643561323 in words is "two billion, six hundred forty-three million, five hundred sixty-one thousand, three hundred twenty-three".