27919305808 has 20 divisors (see below), whose sum is σ = 55838612608. Its totient is φ = 13509341280.

The previous prime is 27919305773. The next prime is 27919305809. The reversal of 27919305808 is 80850391972.

27919305808 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27919305809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28143966 + ... + 28144957.

Almost surely, 2^27919305808 is an apocalyptic number.

It is an amenable number.

27919305808 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27919305808 is a wasteful number, since it uses less digits than its factorization.

27919305808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56288962 (or 56288956 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 27919305808 in words is "twenty-seven billion, nine hundred nineteen million, three hundred five thousand, eight hundred eight".