27869720565 has 16 divisors (see below), whose sum is σ = 45322563456. Its totient is φ = 14620180800.

The previous prime is 27869720561. The next prime is 27869720569. The reversal of 27869720565 is 56502796872.

It is an interprime number because it is at equal distance from previous prime (27869720561) and next prime (27869720569).

It is not a de Polignac number, because 27869720565 - 2² = 27869720561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27869720561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15228441 + ... + 15230270.

It is an arithmetic number, because the mean of its divisors is an integer number (2832660216).

Almost surely, 2^27869720565 is an apocalyptic number.

It is an amenable number.

27869720565 is a deficient number, since it is larger than the sum of its proper divisors (17452842891).

27869720565 is a wasteful number, since it uses less digits than its factorization.

27869720565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30458780.

The product of its (nonzero) digits is 12700800, while the sum is 57.

The spelling of 27869720565 in words is "twenty-seven billion, eight hundred sixty-nine million, seven hundred twenty thousand, five hundred sixty-five".