27565382557 has 8 divisors (see below), whose sum is σ = 28686672000. Its totient is φ = 26455477104.

The previous prime is 27565382459. The next prime is 27565382599. The reversal of 27565382557 is 75528356572.

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

It is a cyclic number.

It is not a de Polignac number, because 27565382557 - 2¹⁵ = 27565349789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27565382498 and 27565382507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27565382057) 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 7 ways as a sum of consecutive naturals, for example, 2841057 + ... + 2850742.

It is an arithmetic number, because the mean of its divisors is an integer number (3585834000).

Almost surely, 2^27565382557 is an apocalyptic number.

It is an amenable number.

27565382557 is a deficient number, since it is larger than the sum of its proper divisors (1121289443).

27565382557 is a wasteful number, since it uses less digits than its factorization.

27565382557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5691995.

The product of its digits is 17640000, while the sum is 55.

The spelling of 27565382557 in words is "twenty-seven billion, five hundred sixty-five million, three hundred eighty-two thousand, five hundred fifty-seven".