27156124987 has 8 divisors (see below), whose sum is σ = 28096333200. Its totient is φ = 26216169504.

The previous prime is 27156124981. The next prime is 27156125011. The reversal of 27156124987 is 78942165172.

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 27156124987 - 2³ = 27156124979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27156124981) 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, 170089 + ... + 288517.

It is an arithmetic number, because the mean of its divisors is an integer number (3512041650).

Almost surely, 2^27156124987 is an apocalyptic number.

27156124987 is a deficient number, since it is larger than the sum of its proper divisors (940208213).

27156124987 is a wasteful number, since it uses less digits than its factorization.

27156124987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126365.

The product of its digits is 1693440, while the sum is 52.

The spelling of 27156124987 in words is "twenty-seven billion, one hundred fifty-six million, one hundred twenty-four thousand, nine hundred eighty-seven".