27721065412 has 6 divisors (see below), whose sum is σ = 48511864478. Its totient is φ = 13860532704.

The previous prime is 27721065401. The next prime is 27721065413. The reversal of 27721065412 is 21456012772.

It can be written as a sum of positive squares in only one way, i.e., 27232920576 + 488144836 = 165024^2 + 22094^2 .

It is not an unprimeable number, because it can be changed into a prime (27721065413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3465133173 + ... + 3465133180.

Almost surely, 2^27721065412 is an apocalyptic number.

It is an amenable number.

27721065412 is a deficient number, since it is larger than the sum of its proper divisors (20790799066).

27721065412 is a wasteful number, since it uses less digits than its factorization.

27721065412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6930266357 (or 6930266355 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The spelling of 27721065412 in words is "twenty-seven billion, seven hundred twenty-one million, sixty-five thousand, four hundred twelve".