27005665019 has 4 divisors (see below), whose sum is σ = 27347508960. Its totient is φ = 26663821080.

The previous prime is 27005665013. The next prime is 27005665033. The reversal of 27005665019 is 91056650072.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27005665019 is a prime.

It is a super-2 number, since 2×27005665019² (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 (27005665013) 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, 170921852 + ... + 170922009.

It is an arithmetic number, because the mean of its divisors is an integer number (6836877240).

Almost surely, 2^27005665019 is an apocalyptic number.

27005665019 is a deficient number, since it is larger than the sum of its proper divisors (341843941).

27005665019 is an equidigital number, since it uses as much as digits as its factorization.

27005665019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341843940.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 27005665019 in words is "twenty-seven billion, five million, six hundred sixty-five thousand, nineteen".