27689569776937 has 4 divisors (see below), whose sum is σ = 27695084533956. Its totient is φ = 27684055019920.

The previous prime is 27689569776929. The next prime is 27689569776977. The reversal of 27689569776937 is 73967796598672.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21934085691456 + 5755484085481 = 4683384^2 + 2399059^2 .

It is a cyclic number.

It is not a de Polignac number, because 27689569776937 - 2³ = 27689569776929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27689569776977) 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, 2757370978 + ... + 2757381019.

It is an arithmetic number, because the mean of its divisors is an integer number (6923771133489).

Almost surely, 2^{27689569776937} is an apocalyptic number.

It is an amenable number.

27689569776937 is a deficient number, since it is larger than the sum of its proper divisors (5514757019).

27689569776937 is an equidigital number, since it uses as much as digits as its factorization.

27689569776937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5514757018.

The product of its digits is 90737055360, while the sum is 91.

The spelling of 27689569776937 in words is "twenty-seven trillion, six hundred eighty-nine billion, five hundred sixty-nine million, seven hundred seventy-six thousand, nine hundred thirty-seven".