27785453568 has 112 divisors (see below), whose sum is σ = 74230717680. Its totient is φ = 9244246016.

The previous prime is 27785453557. The next prime is 27785453593. The reversal of 27785453568 is 86535458772.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22830496 + ... + 22831712.

It is an arithmetic number, because the mean of its divisors is an integer number (662774265).

Almost surely, 2^27785453568 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 27785453568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37115358840).

27785453568 is an abundant number, since it is smaller than the sum of its proper divisors (46445264112).

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

27785453568 is an equidigital number, since it uses as much as digits as its factorization.

27785453568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175 (or 2151 counting only the distinct ones).

The product of its digits is 56448000, while the sum is 60.

The spelling of 27785453568 in words is "twenty-seven billion, seven hundred eighty-five million, four hundred fifty-three thousand, five hundred sixty-eight".