27708506509 has 8 divisors (see below), whose sum is σ = 27742109472. Its totient is φ = 27674927280.

The previous prime is 27708506491. The next prime is 27708506561. The reversal of 27708506509 is 90560580772.

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 27708506509 - 2²³ = 27700117901 is a prime.

It is a super-2 number, since 2×27708506509² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27708500509) 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, 3386994 + ... + 3395164.

It is an arithmetic number, because the mean of its divisors is an integer number (3467763684).

Almost surely, 2^27708506509 is an apocalyptic number.

It is an amenable number.

27708506509 is a deficient number, since it is larger than the sum of its proper divisors (33602963).

27708506509 is a wasteful number, since it uses less digits than its factorization.

27708506509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11867.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 27708506509 in words is "twenty-seven billion, seven hundred eight million, five hundred six thousand, five hundred nine".