27828670771 has 4 divisors (see below), whose sum is σ = 30358549944. Its totient is φ = 25298791600.

The previous prime is 27828670763. The next prime is 27828670787. The reversal of 27828670771 is 17707682872.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27828670771 - 2³ = 27828670763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27828670741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264939570 + ... + 1264939591.

It is an arithmetic number, because the mean of its divisors is an integer number (7589637486).

Almost surely, 2^27828670771 is an apocalyptic number.

27828670771 is a deficient number, since it is larger than the sum of its proper divisors (2529879173).

27828670771 is a wasteful number, since it uses less digits than its factorization.

27828670771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529879172.

The product of its (nonzero) digits is 3687936, while the sum is 55.

The spelling of 27828670771 in words is "twenty-seven billion, eight hundred twenty-eight million, six hundred seventy thousand, seven hundred seventy-one".