27043613643 has 4 divisors (see below), whose sum is σ = 36058151528. Its totient is φ = 18029075760.

The previous prime is 27043613609. The next prime is 27043613699. The reversal of 27043613643 is 34631634072.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 27043613643 - 2¹⁰ = 27043612619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27043618643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4507268938 + ... + 4507268943.

It is an arithmetic number, because the mean of its divisors is an integer number (9014537882).

Almost surely, 2^27043613643 is an apocalyptic number.

27043613643 is a deficient number, since it is larger than the sum of its proper divisors (9014537885).

27043613643 is an equidigital number, since it uses as much as digits as its factorization.

27043613643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9014537884.

The product of its (nonzero) digits is 217728, while the sum is 39.

The spelling of 27043613643 in words is "twenty-seven billion, forty-three million, six hundred thirteen thousand, six hundred forty-three".