27279931065 has 16 divisors (see below), whose sum is σ = 43650050688. Its totient is φ = 14548576256.

The previous prime is 27279931061. The next prime is 27279931121. The reversal of 27279931065 is 56013997272.

It is a cyclic number.

It is not a de Polignac number, because 27279931065 - 2² = 27279931061 is a prime.

It is a super-2 number, since 2×27279931065² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27279930999 and 27279931017.

It is not an unprimeable number, because it can be changed into a prime (27279931061) 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, 429172 + ... + 488618.

It is an arithmetic number, because the mean of its divisors is an integer number (2728128168).

Almost surely, 2^27279931065 is an apocalyptic number.

It is an amenable number.

27279931065 is a deficient number, since it is larger than the sum of its proper divisors (16370119623).

27279931065 is a wasteful number, since it uses less digits than its factorization.

27279931065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90048.

The product of its (nonzero) digits is 1428840, while the sum is 51.

The spelling of 27279931065 in words is "twenty-seven billion, two hundred seventy-nine million, nine hundred thirty-one thousand, sixty-five".