27036960721 has 4 divisors (see below), whose sum is σ = 27040136292. Its totient is φ = 27033785152.

The previous prime is 27036960697. The next prime is 27036960733. The reversal of 27036960721 is 12706963072.

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 24850369600 + 2186591121 = 157640^2 + 46761^2 .

It is a cyclic number.

It is not a de Polignac number, because 27036960721 - 2⁷ = 27036960593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27036967721) 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, 1574980 + ... + 1592053.

It is an arithmetic number, because the mean of its divisors is an integer number (6760034073).

Almost surely, 2^27036960721 is an apocalyptic number.

It is an amenable number.

27036960721 is a deficient number, since it is larger than the sum of its proper divisors (3175571).

27036960721 is an equidigital number, since it uses as much as digits as its factorization.

27036960721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175570.

The product of its (nonzero) digits is 190512, while the sum is 43.

The spelling of 27036960721 in words is "twenty-seven billion, thirty-six million, nine hundred sixty thousand, seven hundred twenty-one".