27808361393 has 4 divisors (see below), whose sum is σ = 29017420608. Its totient is φ = 26599302180.

The previous prime is 27808361387. The next prime is 27808361401. The reversal of 27808361393 is 39316380872.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27808361393 - 2⁸ = 27808361137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27808361333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604529573 + ... + 604529618.

It is an arithmetic number, because the mean of its divisors is an integer number (7254355152).

Almost surely, 2^27808361393 is an apocalyptic number.

27808361393 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

27808361393 is a deficient number, since it is larger than the sum of its proper divisors (1209059215).

27808361393 is a wasteful number, since it uses less digits than its factorization.

27808361393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209059214.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 27808361393 in words is "twenty-seven billion, eight hundred eight million, three hundred sixty-one thousand, three hundred ninety-three".