27819379905 has 32 divisors (see below), whose sum is σ = 44972893440. Its totient is φ = 14683180800.

The previous prime is 27819379849. The next prime is 27819380027. The reversal of 27819379905 is 50997391872.

It is not a de Polignac number, because 27819379905 - 2²⁰ = 27818331329 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5653036 + ... + 5657954.

It is an arithmetic number, because the mean of its divisors is an integer number (1405402920).

Almost surely, 2^27819379905 is an apocalyptic number.

It is an amenable number.

27819379905 is a deficient number, since it is larger than the sum of its proper divisors (17153513535).

27819379905 is a wasteful number, since it uses less digits than its factorization.

27819379905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8761.

The product of its (nonzero) digits is 8573040, while the sum is 60.

The spelling of 27819379905 in words is "twenty-seven billion, eight hundred nineteen million, three hundred seventy-nine thousand, nine hundred five".