27751055388 has 96 divisors (see below), whose sum is σ = 76424345088. Its totient is φ = 7671801600.

The previous prime is 27751055363. The next prime is 27751055399. The reversal of 27751055388 is 88355015772.

It is a self number, because there is not a number n which added to its sum of digits gives 27751055388.

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, 537883 + ... + 587213.

It is an arithmetic number, because the mean of its divisors is an integer number (796086928).

Almost surely, 2^27751055388 is an apocalyptic number.

27751055388 is a gapful number since it is divisible by the number (28) 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 27751055388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38212172544).

27751055388 is an abundant number, since it is smaller than the sum of its proper divisors (48673289700).

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

27751055388 is a wasteful number, since it uses less digits than its factorization.

27751055388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49563 (or 49561 counting only the distinct ones).

The product of its (nonzero) digits is 2352000, while the sum is 51.

The spelling of 27751055388 in words is "twenty-seven billion, seven hundred fifty-one million, fifty-five thousand, three hundred eighty-eight".