27945858467 has 4 divisors (see below), whose sum is σ = 28328678520. Its totient is φ = 27563038416.

The previous prime is 27945858461. The next prime is 27945858469. The reversal of 27945858467 is 76485854972.

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

It is a cyclic number.

It is not a de Polignac number, because 27945858467 - 2²⁰ = 27944809891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27945858461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191409917 + ... + 191410062.

It is an arithmetic number, because the mean of its divisors is an integer number (7082169630).

Almost surely, 2^27945858467 is an apocalyptic number.

27945858467 is a deficient number, since it is larger than the sum of its proper divisors (382820053).

27945858467 is an equidigital number, since it uses as much as digits as its factorization.

27945858467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382820052.

The product of its digits is 135475200, while the sum is 65.

The spelling of 27945858467 in words is "twenty-seven billion, nine hundred forty-five million, eight hundred fifty-eight thousand, four hundred sixty-seven".