27808361672 has 32 divisors (see below), whose sum is σ = 64173144000. Its totient is φ = 11001109824.

The previous prime is 27808361663. The next prime is 27808361681. The reversal of 27808361672 is 27616380872.

It is an interprime number because it is at equal distance from previous prime (27808361663) and next prime (27808361681).

It is a self number, because there is not a number n which added to its sum of digits gives 27808361672.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19098422 + ... + 19099877.

It is an arithmetic number, because the mean of its divisors is an integer number (2005410750).

Almost surely, 2^27808361672 is an apocalyptic number.

It is an amenable number.

27808361672 is an abundant number, since it is smaller than the sum of its proper divisors (36364782328).

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

27808361672 is a wasteful number, since it uses less digits than its factorization.

27808361672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38198325 (or 38198321 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 27808361672 in words is "twenty-seven billion, eight hundred eight million, three hundred sixty-one thousand, six hundred seventy-two".