27771248648 has 64 divisors (see below), whose sum is σ = 62666593920. Its totient is φ = 11368051200.

The previous prime is 27771248641. The next prime is 27771248651. The reversal of 27771248648 is 84684217772.

It is a junction number, because it is equal to n+sod(n) for n = 27771248593 and 27771248602.

It is not an unprimeable number, because it can be changed into a prime (27771248641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249140 + ... + 342947.

It is an arithmetic number, because the mean of its divisors is an integer number (979165530).

Almost surely, 2^27771248648 is an apocalyptic number.

It is an amenable number.

27771248648 is an abundant number, since it is smaller than the sum of its proper divisors (34895345272).

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

27771248648 is a wasteful number, since it uses less digits than its factorization.

27771248648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592158 (or 592154 counting only the distinct ones).

The product of its digits is 8429568, while the sum is 56.

The spelling of 27771248648 in words is "twenty-seven billion, seven hundred seventy-one million, two hundred forty-eight thousand, six hundred forty-eight".