27934064591 has 4 divisors (see below), whose sum is σ = 27934748184. Its totient is φ = 27933381000.

The previous prime is 27934064563. The next prime is 27934064621. The reversal of 27934064591 is 19546043972.

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 27934064591 - 2¹⁸ = 27933802447 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 (27934064891) 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, 276320 + ... + 363621.

It is an arithmetic number, because the mean of its divisors is an integer number (6983687046).

Almost surely, 2^27934064591 is an apocalyptic number.

27934064591 is a deficient number, since it is larger than the sum of its proper divisors (683593).

27934064591 is an equidigital number, since it uses as much as digits as its factorization.

27934064591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683592.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 27934064591 in words is "twenty-seven billion, nine hundred thirty-four million, sixty-four thousand, five hundred ninety-one".