27658997877 has 16 divisors (see below), whose sum is σ = 42415501952. Its totient is φ = 15704470080.

The previous prime is 27658997869. The next prime is 27658997881. The reversal of 27658997877 is 77879985672.

It is not a de Polignac number, because 27658997877 - 2³ = 27658997869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27658997799 and 27658997808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27658997897) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4191274 + ... + 4197867.

It is an arithmetic number, because the mean of its divisors is an integer number (2650968872).

Almost surely, 2^27658997877 is an apocalyptic number.

It is an amenable number.

27658997877 is a deficient number, since it is larger than the sum of its proper divisors (14756504075).

27658997877 is a wasteful number, since it uses less digits than its factorization.

27658997877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8389308.

The product of its digits is 746807040, while the sum is 75.

The spelling of 27658997877 in words is "twenty-seven billion, six hundred fifty-eight million, nine hundred ninety-seven thousand, eight hundred seventy-seven".