27665216615 has 8 divisors (see below), whose sum is σ = 34641662688. Its totient is φ = 21169904800.

The previous prime is 27665216599. The next prime is 27665216617. The reversal of 27665216615 is 51661256672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27665216615 - 2⁴ = 27665216599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27665216615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27665216617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120283436 + ... + 120283665.

It is an arithmetic number, because the mean of its divisors is an integer number (4330207836).

Almost surely, 2^27665216615 is an apocalyptic number.

27665216615 is a deficient number, since it is larger than the sum of its proper divisors (6976446073).

27665216615 is a wasteful number, since it uses less digits than its factorization.

27665216615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240567129.

The product of its digits is 907200, while the sum is 47.

The spelling of 27665216615 in words is "twenty-seven billion, six hundred sixty-five million, two hundred sixteen thousand, six hundred fifteen".