27945309517 has 8 divisors (see below), whose sum is σ = 28598193536. Its totient is φ = 27292561632.

The previous prime is 27945309503. The next prime is 27945309547. The reversal of 27945309517 is 71590354972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27945309517 - 2⁷ = 27945309389 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 (27945309547) 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 7 ways as a sum of consecutive naturals, for example, 466108 + ... + 522634.

It is an arithmetic number, because the mean of its divisors is an integer number (3574774192).

Almost surely, 2^27945309517 is an apocalyptic number.

It is an amenable number.

27945309517 is a deficient number, since it is larger than the sum of its proper divisors (652884019).

27945309517 is a wasteful number, since it uses less digits than its factorization.

27945309517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68067.

The product of its (nonzero) digits is 2381400, while the sum is 52.

The spelling of 27945309517 in words is "twenty-seven billion, nine hundred forty-five million, three hundred nine thousand, five hundred seventeen".