27731638827 has 12 divisors (see below), whose sum is σ = 40344991960. Its totient is φ = 18354752928.

The previous prime is 27731638813. The next prime is 27731638849. The reversal of 27731638827 is 72883613772.

It is a happy number.

27731638827 is a `hidden beast` number, since 277 + 316 + 38 + 8 + 27 = 666.

It is not a de Polignac number, because 27731638827 - 2⁶ = 27731638763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27731638897) 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, 11082538 + ... + 11085039.

Almost surely, 2^27731638827 is an apocalyptic number.

27731638827 is a deficient number, since it is larger than the sum of its proper divisors (12613353133).

27731638827 is a wasteful number, since it uses less digits than its factorization.

27731638827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22167722 (or 22167719 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 54.

The spelling of 27731638827 in words is "twenty-seven billion, seven hundred thirty-one million, six hundred thirty-eight thousand, eight hundred twenty-seven".