27151005065 has 16 divisors (see below), whose sum is σ = 34503118992. Its totient is φ = 20439926784.

The previous prime is 27151005061. The next prime is 27151005071. The reversal of 27151005065 is 56050015172.

It can be written as a sum of positive squares in 8 ways, for example, as 4972647289 + 22178357776 = 70517^2 + 148924^2 .

It is a cyclic number.

It is not a de Polignac number, because 27151005065 - 2² = 27151005061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27151005061) 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 15 ways as a sum of consecutive naturals, for example, 622967 + ... + 665123.

It is an arithmetic number, because the mean of its divisors is an integer number (2156444937).

Almost surely, 2^27151005065 is an apocalyptic number.

It is an amenable number.

27151005065 is a deficient number, since it is larger than the sum of its proper divisors (7352113927).

27151005065 is a wasteful number, since it uses less digits than its factorization.

27151005065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49756.

The product of its (nonzero) digits is 10500, while the sum is 32.

The spelling of 27151005065 in words is "twenty-seven billion, one hundred fifty-one million, five thousand, sixty-five".