27657566497 has 8 divisors (see below), whose sum is σ = 30173111712. Its totient is φ = 25142224800.

The previous prime is 27657566479. The next prime is 27657566537. The reversal of 27657566497 is 79466575672.

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

It is a de Polignac number, because none of the positive numbers 2^k-27657566497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27657566477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435358 + ... + 494824.

It is an arithmetic number, because the mean of its divisors is an integer number (3771638964).

Almost surely, 2^27657566497 is an apocalyptic number.

It is an amenable number.

27657566497 is a deficient number, since it is larger than the sum of its proper divisors (2515545215).

27657566497 is a wasteful number, since it uses less digits than its factorization.

27657566497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101759.

The product of its digits is 133358400, while the sum is 64.

The spelling of 27657566497 in words is "twenty-seven billion, six hundred fifty-seven million, five hundred sixty-six thousand, four hundred ninety-seven".