27556660368 has 120 divisors (see below), whose sum is σ = 79690780416. Its totient is φ = 8880019200.

The previous prime is 27556660361. The next prime is 27556660379. The reversal of 27556660368 is 86306665572.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (27556660361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5269371 + ... + 5274597.

Almost surely, 2^27556660368 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 27556660368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39845390208).

27556660368 is an abundant number, since it is smaller than the sum of its proper divisors (52134120048).

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

27556660368 is a wasteful number, since it uses less digits than its factorization.

27556660368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453 (or 6444 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 27556660368 in words is "twenty-seven billion, five hundred fifty-six million, six hundred sixty thousand, three hundred sixty-eight".