27731945467 has 4 divisors (see below), whose sum is σ = 28001187760. Its totient is φ = 27462703176.

The previous prime is 27731945429. The next prime is 27731945473. The reversal of 27731945467 is 76454913772.

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-27731945467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27731945867) 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, 134620992 + ... + 134621197.

It is an arithmetic number, because the mean of its divisors is an integer number (7000296940).

Almost surely, 2^27731945467 is an apocalyptic number.

27731945467 is a deficient number, since it is larger than the sum of its proper divisors (269242293).

27731945467 is a wasteful number, since it uses less digits than its factorization.

27731945467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269242292.

The product of its digits is 8890560, while the sum is 55.

The spelling of 27731945467 in words is "twenty-seven billion, seven hundred thirty-one million, nine hundred forty-five thousand, four hundred sixty-seven".