27657685636 has 45 divisors (see below), whose sum is σ = 56497707749. Its totient is φ = 11846308992.

The previous prime is 27657685591. The next prime is 27657685681. The reversal of 27657685636 is 63658675672.

The square root of 27657685636 is 166306.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (27657685591) and next prime (27657685681).

It can be written as a sum of positive squares in only one way, i.e., 26624448900 + 1033236736 = 163170^2 + 32144^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 16297140 + ... + 16298836.

Almost surely, 2^27657685636 is an apocalyptic number.

27657685636 is the 166306-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27657685636

27657685636 is an abundant number, since it is smaller than the sum of its proper divisors (28840022113).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27657685636 is an frugal number, since it uses more digits than its factorization.

27657685636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3426 (or 1706 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 61.

The spelling of 27657685636 in words is "twenty-seven billion, six hundred fifty-seven million, six hundred eighty-five thousand, six hundred thirty-six".