27687837357 has 12 divisors (see below), whose sum is σ = 39997240764. Its totient is φ = 18456851520.

The previous prime is 27687837341. The next prime is 27687837403. The reversal of 27687837357 is 75373878672.

27687837357 is a `hidden beast` number, since 276 + 8 + 7 + 8 + 3 + 7 + 357 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25503770601 + 2184066756 = 159699^2 + 46734^2 .

It is not a de Polignac number, because 27687837357 - 2⁴ = 27687837341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27687837294 and 27687837303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27687837857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35248 + ... + 237945.

It is an arithmetic number, because the mean of its divisors is an integer number (3333103397).

Almost surely, 2^27687837357 is an apocalyptic number.

It is an amenable number.

27687837357 is a deficient number, since it is larger than the sum of its proper divisors (12309403407).

27687837357 is a wasteful number, since it uses less digits than its factorization.

27687837357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284460 (or 284457 counting only the distinct ones).

The product of its digits is 82978560, while the sum is 63.

The spelling of 27687837357 in words is "twenty-seven billion, six hundred eighty-seven million, eight hundred thirty-seven thousand, three hundred fifty-seven".