27081348457 has 4 divisors (see below), whose sum is σ = 27081744976. Its totient is φ = 27080951940.

The previous prime is 27081348433. The next prime is 27081348461. The reversal of 27081348457 is 75484318072.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27081348457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27081348457.

It is not an unprimeable number, because it can be changed into a prime (27081348407) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 66723 + ... + 242104.

It is an arithmetic number, because the mean of its divisors is an integer number (6770436244).

Almost surely, 2^27081348457 is an apocalyptic number.

It is an amenable number.

27081348457 is a deficient number, since it is larger than the sum of its proper divisors (396519).

27081348457 is an equidigital number, since it uses as much as digits as its factorization.

27081348457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396518.

The product of its (nonzero) digits is 1505280, while the sum is 49.

The spelling of 27081348457 in words is "twenty-seven billion, eighty-one million, three hundred forty-eight thousand, four hundred fifty-seven".