27657877869 has 16 divisors (see below), whose sum is σ = 41669121600. Its totient is φ = 18126065808.

The previous prime is 27657877837. The next prime is 27657877943. The reversal of 27657877869 is 96877875672.

It is not a de Polignac number, because 27657877869 - 2⁵ = 27657877837 is a prime.

It is a super-2 number, since 2×27657877869² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27657877797 and 27657877806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27657877829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8679474 + ... + 8682659.

It is an arithmetic number, because the mean of its divisors is an integer number (2604320100).

Almost surely, 2^27657877869 is an apocalyptic number.

It is an amenable number.

27657877869 is a deficient number, since it is larger than the sum of its proper divisors (14011243731).

27657877869 is a wasteful number, since it uses less digits than its factorization.

27657877869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17362201 (or 17362195 counting only the distinct ones).

The product of its digits is 497871360, while the sum is 72.

The spelling of 27657877869 in words is "twenty-seven billion, six hundred fifty-seven million, eight hundred seventy-seven thousand, eight hundred sixty-nine".