27773321705 has 4 divisors (see below), whose sum is σ = 33327986052. Its totient is φ = 22218657360.

The previous prime is 27773321701. The next prime is 27773321707. The reversal of 27773321705 is 50712337772.

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 18087022144 + 9686299561 = 134488^2 + 98419^2 .

It is not a de Polignac number, because 27773321705 - 2² = 27773321701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27773321701) 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, 2777332166 + ... + 2777332175.

It is an arithmetic number, because the mean of its divisors is an integer number (8331996513).

Almost surely, 2^27773321705 is an apocalyptic number.

It is an amenable number.

27773321705 is a deficient number, since it is larger than the sum of its proper divisors (5554664347).

27773321705 is an equidigital number, since it uses as much as digits as its factorization.

27773321705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5554664346.

The product of its (nonzero) digits is 432180, while the sum is 44.

The spelling of 27773321705 in words is "twenty-seven billion, seven hundred seventy-three million, three hundred twenty-one thousand, seven hundred five".