27748127081 has 8 divisors (see below), whose sum is σ = 27985580928. Its totient is φ = 27511380000.

The previous prime is 27748127053. The next prime is 27748127087. The reversal of 27748127081 is 18072184772.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27748127081 is a prime.

It is a super-2 number, since 2×27748127081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27748127087) 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, 97685 + ... + 255026.

It is an arithmetic number, because the mean of its divisors is an integer number (3498197616).

Almost surely, 2^27748127081 is an apocalyptic number.

It is an amenable number.

27748127081 is a deficient number, since it is larger than the sum of its proper divisors (237453847).

27748127081 is a wasteful number, since it uses less digits than its factorization.

27748127081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353383.

The product of its (nonzero) digits is 351232, while the sum is 47.

The spelling of 27748127081 in words is "twenty-seven billion, seven hundred forty-eight million, one hundred twenty-seven thousand, eighty-one".