27747708858 has 48 divisors (see below), whose sum is σ = 60585947136. Its totient is φ = 9177809760.

The previous prime is 27747708841. The next prime is 27747708883. The reversal of 27747708858 is 85880774772.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27747708795 and 27747708804.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1347903 + ... + 1368333.

It is an arithmetic number, because the mean of its divisors is an integer number (1262207232).

Almost surely, 2^27747708858 is an apocalyptic number.

27747708858 is an abundant number, since it is smaller than the sum of its proper divisors (32838238278).

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

27747708858 is a wasteful number, since it uses less digits than its factorization.

27747708858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21019 (or 21016 counting only the distinct ones).

The product of its (nonzero) digits is 49172480, while the sum is 63.

The spelling of 27747708858 in words is "twenty-seven billion, seven hundred forty-seven million, seven hundred eight thousand, eight hundred fifty-eight".