27786823660 has 24 divisors (see below), whose sum is σ = 59151679776. Its totient is φ = 10962472320.

The previous prime is 27786823651. The next prime is 27786823679. The reversal of 27786823660 is 6632868772.

It is a super-2 number, since 2×27786823660² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9514576 + ... + 9517495.

It is an arithmetic number, because the mean of its divisors is an integer number (2464653324).

Almost surely, 2^27786823660 is an apocalyptic number.

27786823660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27786823660 is an abundant number, since it is smaller than the sum of its proper divisors (31364856116).

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

27786823660 is a wasteful number, since it uses less digits than its factorization.

27786823660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19032153 (or 19032151 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 27786823660 in words is "twenty-seven billion, seven hundred eighty-six million, eight hundred twenty-three thousand, six hundred sixty".