27164864865 has 16 divisors (see below), whose sum is σ = 43466038848. Its totient is φ = 14487176256.

The previous prime is 27164864819. The next prime is 27164864873. The reversal of 27164864865 is 56846846172.

It is not a de Polignac number, because 27164864865 - 2¹⁰ = 27164863841 is a prime.

It is a super-2 number, since 2×27164864865² (a number of 22 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 372714 + ... + 439596.

It is an arithmetic number, because the mean of its divisors is an integer number (2716627428).

Almost surely, 2^27164864865 is an apocalyptic number.

It is an amenable number.

27164864865 is a deficient number, since it is larger than the sum of its proper divisors (16301173983).

27164864865 is a wasteful number, since it uses less digits than its factorization.

27164864865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93968.

The product of its digits is 15482880, while the sum is 57.

The spelling of 27164864865 in words is "twenty-seven billion, one hundred sixty-four million, eight hundred sixty-four thousand, eight hundred sixty-five".