27155186064 has 160 divisors (see below), whose sum is σ = 80578176000. Its totient is φ = 8746859520.

The previous prime is 27155186057. The next prime is 27155186119. The reversal of 27155186064 is 46068155172.

27155186064 is a `hidden beast` number, since 2 + 7 + 15 + 518 + 60 + 64 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14047242 + ... + 14049174.

It is an arithmetic number, because the mean of its divisors is an integer number (503613600).

Almost surely, 2^27155186064 is an apocalyptic number.

27155186064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27155186064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40289088000).

27155186064 is an abundant number, since it is smaller than the sum of its proper divisors (53422989936).

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

27155186064 is a wasteful number, since it uses less digits than its factorization.

27155186064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030 (or 3018 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 27155186064 in words is "twenty-seven billion, one hundred fifty-five million, one hundred eighty-six thousand, sixty-four".