27129787445 has 8 divisors (see below), whose sum is σ = 32691962880. Its totient is φ = 21613018000.

The previous prime is 27129787417. The next prime is 27129787459. The reversal of 27129787445 is 54478792172.

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

It is not a de Polignac number, because 27129787445 - 2²⁰ = 27128738869 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 11350181 + ... + 11352570.

It is an arithmetic number, because the mean of its divisors is an integer number (4086495360).

Almost surely, 2^27129787445 is an apocalyptic number.

It is an amenable number.

27129787445 is a deficient number, since it is larger than the sum of its proper divisors (5562175435).

27129787445 is a wasteful number, since it uses less digits than its factorization.

27129787445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22702995.

The product of its digits is 7902720, while the sum is 56.

The spelling of 27129787445 in words is "twenty-seven billion, one hundred twenty-nine million, seven hundred eighty-seven thousand, four hundred forty-five".