27657675649 has 8 divisors (see below), whose sum is σ = 29292451848. Its totient is φ = 26023772160.

The previous prime is 27657675611. The next prime is 27657675677. The reversal of 27657675649 is 94657675672.

It can be written as a sum of positive squares in 4 ways, for example, as 1620626049 + 26037049600 = 40257^2 + 161360^2 .

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 27657675649 - 2⁹ = 27657675137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27657675949) 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, 152352 + ... + 280225.

It is an arithmetic number, because the mean of its divisors is an integer number (3661556481).

Almost surely, 2^27657675649 is an apocalyptic number.

It is an amenable number.

27657675649 is a deficient number, since it is larger than the sum of its proper divisors (1634776199).

27657675649 is a wasteful number, since it uses less digits than its factorization.

27657675649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436355.

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

The spelling of 27657675649 in words is "twenty-seven billion, six hundred fifty-seven million, six hundred seventy-five thousand, six hundred forty-nine".