27658685672 has 8 divisors (see below), whose sum is σ = 51860035650. Its totient is φ = 13829342832.

The previous prime is 27658685669. The next prime is 27658685683.

It is a happy number.

27658685672 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 22101579556 + 5557106116 = 148666^2 + 74546^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1728667847 + ... + 1728667862.

Almost surely, 2^27658685672 is an apocalyptic number.

It is an amenable number.

27658685672 is a deficient number, since it is larger than the sum of its proper divisors (24201349978).

27658685672 is a wasteful number, since it uses less digits than its factorization.

27658685672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457335715 (or 3457335711 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 62.

The spelling of 27658685672 in words is "twenty-seven billion, six hundred fifty-eight million, six hundred eighty-five thousand, six hundred seventy-two".