27657463665 has 32 divisors (see below), whose sum is σ = 47736501120. Its totient is φ = 13592964096.

The previous prime is 27657463651. The next prime is 27657463679. The reversal of 27657463665 is 56636475672.

It is an interprime number because it is at equal distance from previous prime (27657463651) and next prime (27657463679).

It is not a de Polignac number, because 27657463665 - 2⁴ = 27657463649 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3955 + ... + 235224.

It is an arithmetic number, because the mean of its divisors is an integer number (1491765660).

Almost surely, 2^27657463665 is an apocalyptic number.

It is an amenable number.

27657463665 is a deficient number, since it is larger than the sum of its proper divisors (20079037455).

27657463665 is a wasteful number, since it uses less digits than its factorization.

27657463665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239793.

The product of its digits is 38102400, while the sum is 57.

The spelling of 27657463665 in words is "twenty-seven billion, six hundred fifty-seven million, four hundred sixty-three thousand, six hundred sixty-five".