27720717276 has 144 divisors (see below), whose sum is σ = 79883949600. Its totient is φ = 7434104832.

The previous prime is 27720717257. The next prime is 27720717281. The reversal of 27720717276 is 67271702772.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3884880 + ... + 3892008.

It is an arithmetic number, because the mean of its divisors is an integer number (554749650).

Almost surely, 2^27720717276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27720717276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39941974800).

27720717276 is an abundant number, since it is smaller than the sum of its proper divisors (52163232324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27720717276 is a wasteful number, since it uses less digits than its factorization.

27720717276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7556 (or 7547 counting only the distinct ones).

The product of its (nonzero) digits is 806736, while the sum is 48.

The spelling of 27720717276 in words is "twenty-seven billion, seven hundred twenty million, seven hundred seventeen thousand, two hundred seventy-six".