27768555860 has 24 divisors (see below), whose sum is σ = 61383124320. Its totient is φ = 10522821024.

The previous prime is 27768555827. The next prime is 27768555883. The reversal of 27768555860 is 6855586772.

It is a self number, because there is not a number n which added to its sum of digits gives 27768555860.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36537194 + ... + 36537953.

It is an arithmetic number, because the mean of its divisors is an integer number (2557630180).

Almost surely, 2^27768555860 is an apocalyptic number.

27768555860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27768555860 is an abundant number, since it is smaller than the sum of its proper divisors (33614568460).

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

27768555860 is a wasteful number, since it uses less digits than its factorization.

27768555860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73075175 (or 73075173 counting only the distinct ones).

The product of its (nonzero) digits is 28224000, while the sum is 59.

The spelling of 27768555860 in words is "twenty-seven billion, seven hundred sixty-eight million, five hundred fifty-five thousand, eight hundred sixty".