27127553257 has 4 divisors (see below), whose sum is σ = 31002918016. Its totient is φ = 23252188500.

The previous prime is 27127553227. The next prime is 27127553261. The reversal of 27127553257 is 75235572172.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27127553257 is a prime.

It is a super-2 number, since 2×27127553257² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27127553227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1937682369 + ... + 1937682382.

It is an arithmetic number, because the mean of its divisors is an integer number (7750729504).

Almost surely, 2^27127553257 is an apocalyptic number.

It is an amenable number.

27127553257 is a deficient number, since it is larger than the sum of its proper divisors (3875364759).

27127553257 is an equidigital number, since it uses as much as digits as its factorization.

27127553257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875364758.

The product of its digits is 1029000, while the sum is 46.

The spelling of 27127553257 in words is "twenty-seven billion, one hundred twenty-seven million, five hundred fifty-three thousand, two hundred fifty-seven".