27027278917 has 4 divisors (see below), whose sum is σ = 27899126656. Its totient is φ = 26155431180.

The previous prime is 27027278849. The next prime is 27027278933. The reversal of 27027278917 is 71987272072.

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-27027278917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27027278977) 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, 435923823 + ... + 435923884.

It is an arithmetic number, because the mean of its divisors is an integer number (6974781664).

Almost surely, 2^27027278917 is an apocalyptic number.

It is an amenable number.

27027278917 is a deficient number, since it is larger than the sum of its proper divisors (871847739).

27027278917 is an equidigital number, since it uses as much as digits as its factorization.

27027278917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871847738.

The product of its (nonzero) digits is 1382976, while the sum is 52.

The spelling of 27027278917 in words is "twenty-seven billion, twenty-seven million, two hundred seventy-eight thousand, nine hundred seventeen".