27759515117 has 4 divisors (see below), whose sum is σ = 28405085280. Its totient is φ = 27113944956.

The previous prime is 27759515089. The next prime is 27759515137. The reversal of 27759515117 is 71151595772.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27759515117 - 2³⁰ = 26685773293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27759515137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322785017 + ... + 322785102.

It is an arithmetic number, because the mean of its divisors is an integer number (7101271320).

Almost surely, 2^27759515117 is an apocalyptic number.

It is an amenable number.

27759515117 is a deficient number, since it is larger than the sum of its proper divisors (645570163).

27759515117 is an equidigital number, since it uses as much as digits as its factorization.

27759515117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645570162.

The product of its digits is 771750, while the sum is 50.

The spelling of 27759515117 in words is "twenty-seven billion, seven hundred fifty-nine million, five hundred fifteen thousand, one hundred seventeen".