27918185856 has 256 divisors, whose sum is σ = 84097612800. Its totient is φ = 8138188800.

The previous prime is 27918185843. The next prime is 27918185863. The reversal of 27918185856 is 65858181972.

It is a self number, because there is not a number n which added to its sum of digits gives 27918185856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103019001 + ... + 103019271.

It is an arithmetic number, because the mean of its divisors is an integer number (328506300).

Almost surely, 2^27918185856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27918185856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42048806400).

27918185856 is an abundant number, since it is smaller than the sum of its proper divisors (56179426944).

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

27918185856 is an equidigital number, since it uses as much as digits as its factorization.

27918185856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 316 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 60.

The spelling of 27918185856 in words is "twenty-seven billion, nine hundred eighteen million, one hundred eighty-five thousand, eight hundred fifty-six".