27658135989 has 40 divisors (see below), whose sum is σ = 45106554240. Its totient is φ = 16749849600.

The previous prime is 27658135963. The next prime is 27658135991. The reversal of 27658135989 is 98953185672.

27658135989 is a `hidden beast` number, since 27 + 6 + 5 + 8 + 13 + 598 + 9 = 666.

It is not a de Polignac number, because 27658135989 - 2¹³ = 27658127797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27658135189) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1244404 + ... + 1266434.

It is an arithmetic number, because the mean of its divisors is an integer number (1127663856).

Almost surely, 2^27658135989 is an apocalyptic number.

It is an amenable number.

27658135989 is a deficient number, since it is larger than the sum of its proper divisors (17448418251).

27658135989 is a wasteful number, since it uses less digits than its factorization.

27658135989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23463 (or 23454 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The spelling of 27658135989 in words is "twenty-seven billion, six hundred fifty-eight million, one hundred thirty-five thousand, nine hundred eighty-nine".