27945194905 has 16 divisors (see below), whose sum is σ = 34256162304. Its totient is φ = 21875104960.

The previous prime is 27945194903. The next prime is 27945194909. The reversal of 27945194905 is 50949154972.

It is a happy number.

It is not a de Polignac number, because 27945194905 - 2¹ = 27945194903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27945194903) 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 15 ways as a sum of consecutive naturals, for example, 1132479 + ... + 1156891.

It is an arithmetic number, because the mean of its divisors is an integer number (2141010144).

Almost surely, 2^27945194905 is an apocalyptic number.

It is an amenable number.

27945194905 is a deficient number, since it is larger than the sum of its proper divisors (6310967399).

27945194905 is a wasteful number, since it uses less digits than its factorization.

27945194905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29336.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 27945194905 in words is "twenty-seven billion, nine hundred forty-five million, one hundred ninety-four thousand, nine hundred five".