27756620928 has 192 divisors, whose sum is σ = 83079734400. Its totient is φ = 8887117824.

The previous prime is 27756620909. The next prime is 27756620951. The reversal of 27756620928 is 82902665772.

27756620928 is a `hidden beast` number, since 2 + 7 + 7 + 5 + 6 + 620 + 9 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3363175 + ... + 3371417.

It is an arithmetic number, because the mean of its divisors is an integer number (432706950).

Almost surely, 2^27756620928 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 27756620928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41539867200).

27756620928 is an abundant number, since it is smaller than the sum of its proper divisors (55323113472).

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

27756620928 is a wasteful number, since it uses less digits than its factorization.

27756620928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8379 (or 8364 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 27756620928 in words is "twenty-seven billion, seven hundred fifty-six million, six hundred twenty thousand, nine hundred twenty-eight".