27721065416 has 32 divisors (see below), whose sum is σ = 56714489280. Its totient is φ = 12597748800.

The previous prime is 27721065413. The next prime is 27721065451. The reversal of 27721065416 is 61456012772.

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 in 7 ways as a sum of consecutive naturals, for example, 405386 + ... + 468806.

It is an arithmetic number, because the mean of its divisors is an integer number (1772327790).

Almost surely, 2^27721065416 is an apocalyptic number.

It is an amenable number.

27721065416 is an abundant number, since it is smaller than the sum of its proper divisors (28993423864).

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

27721065416 is a wasteful number, since it uses less digits than its factorization.

27721065416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68405 (or 68401 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 27721065416 in words is "twenty-seven billion, seven hundred twenty-one million, sixty-five thousand, four hundred sixteen".