27748820673 has 80 divisors (see below), whose sum is σ = 51327619200. Its totient is φ = 14576454144.

The previous prime is 27748820669. The next prime is 27748820713. The reversal of 27748820673 is 37602884772.

27748820673 is a `hidden beast` number, since 2 + 77 + 488 + 20 + 6 + 73 = 666.

It is not a de Polignac number, because 27748820673 - 2² = 27748820669 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27748820653) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 381003 + ... + 447951.

It is an arithmetic number, because the mean of its divisors is an integer number (641595240).

Almost surely, 2^27748820673 is an apocalyptic number.

It is an amenable number.

27748820673 is a deficient number, since it is larger than the sum of its proper divisors (23578798527).

27748820673 is a wasteful number, since it uses less digits than its factorization.

27748820673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67028 (or 67019 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 54.

The spelling of 27748820673 in words is "twenty-seven billion, seven hundred forty-eight million, eight hundred twenty thousand, six hundred seventy-three".