27878493443 has 4 divisors (see below), whose sum is σ = 29518404840. Its totient is φ = 26238582048.

The previous prime is 27878493431. The next prime is 27878493457. The reversal of 27878493443 is 34439487872.

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

It is a cyclic number.

It is not a de Polignac number, because 27878493443 - 2²⁰ = 27877444867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27878493343) 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, 819955673 + ... + 819955706.

It is an arithmetic number, because the mean of its divisors is an integer number (7379601210).

Almost surely, 2^27878493443 is an apocalyptic number.

27878493443 is a deficient number, since it is larger than the sum of its proper divisors (1639911397).

27878493443 is a wasteful number, since it uses less digits than its factorization.

27878493443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639911396.

The product of its digits is 32514048, while the sum is 59.

The spelling of 27878493443 in words is "twenty-seven billion, eight hundred seventy-eight million, four hundred ninety-three thousand, four hundred forty-three".