27768384073 has 4 divisors (see below), whose sum is σ = 27816510100. Its totient is φ = 27720258048.

The previous prime is 27768384029. The next prime is 27768384221. The reversal of 27768384073 is 37048386772.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25565771449 + 2202612624 = 159893^2 + 46932^2 .

It is a cyclic number.

It is not a de Polignac number, because 27768384073 - 2²¹ = 27766286921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27768388073) 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, 24062148 + ... + 24063301.

It is an arithmetic number, because the mean of its divisors is an integer number (6954127525).

Almost surely, 2^27768384073 is an apocalyptic number.

It is an amenable number.

27768384073 is a deficient number, since it is larger than the sum of its proper divisors (48126027).

27768384073 is an equidigital number, since it uses as much as digits as its factorization.

27768384073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48126026.

The product of its (nonzero) digits is 9483264, while the sum is 55.

The spelling of 27768384073 in words is "twenty-seven billion, seven hundred sixty-eight million, three hundred eighty-four thousand, seventy-three".