27747854816 has 96 divisors (see below), whose sum is σ = 60755909760. Its totient is φ = 12368012800.

The previous prime is 27747854803. The next prime is 27747854819. The reversal of 27747854816 is 61845874772.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27747854819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9697226 + ... + 9700086.

It is an arithmetic number, because the mean of its divisors is an integer number (632874060).

Almost surely, 2^27747854816 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 27747854816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30377954880).

27747854816 is an abundant number, since it is smaller than the sum of its proper divisors (33008054944).

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

27747854816 is a wasteful number, since it uses less digits than its factorization.

27747854816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408 (or 3400 counting only the distinct ones).

The product of its digits is 21073920, while the sum is 59.

The spelling of 27747854816 in words is "twenty-seven billion, seven hundred forty-seven million, eight hundred fifty-four thousand, eight hundred sixteen".