27137828787 has 4 divisors (see below), whose sum is σ = 36183771720. Its totient is φ = 18091885856.

The previous prime is 27137828759. The next prime is 27137828789. The reversal of 27137828787 is 78782873172.

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

It is a cyclic number.

It is not a de Polignac number, because 27137828787 - 2¹⁵ = 27137796019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27137828787.

It is not an unprimeable number, because it can be changed into a prime (27137828789) 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, 4522971462 + ... + 4522971467.

It is an arithmetic number, because the mean of its divisors is an integer number (9045942930).

Almost surely, 2^27137828787 is an apocalyptic number.

27137828787 is a deficient number, since it is larger than the sum of its proper divisors (9045942933).

27137828787 is an equidigital number, since it uses as much as digits as its factorization.

27137828787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9045942932.

The product of its digits is 14751744, while the sum is 60.

The spelling of 27137828787 in words is "twenty-seven billion, one hundred thirty-seven million, eight hundred twenty-eight thousand, seven hundred eighty-seven".