27748340971 has 4 divisors (see below), whose sum is σ = 29882828752. Its totient is φ = 25613853192.

The previous prime is 27748340929. The next prime is 27748341013. The reversal of 27748340971 is 17904384772.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (27748340929) and next prime (27748341013).

It is a cyclic number.

It is not a de Polignac number, because 27748340971 - 2¹¹ = 27748338923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27748340911) 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, 1067243871 + ... + 1067243896.

It is an arithmetic number, because the mean of its divisors is an integer number (7470707188).

Almost surely, 2^27748340971 is an apocalyptic number.

27748340971 is a deficient number, since it is larger than the sum of its proper divisors (2134487781).

27748340971 is a wasteful number, since it uses less digits than its factorization.

27748340971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134487780.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 27748340971 in words is "twenty-seven billion, seven hundred forty-eight million, three hundred forty thousand, nine hundred seventy-one".