27639493173 has 72 divisors (see below), whose sum is σ = 44289012768. Its totient is φ = 16586627904.

The previous prime is 27639493171. The next prime is 27639493199. The reversal of 27639493173 is 37139493672.

27639493173 is a `hidden beast` number, since 27 + 63 + 9 + 493 + 1 + 73 = 666.

It is not a de Polignac number, because 27639493173 - 2¹ = 27639493171 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27639493171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5166486 + ... + 5171832.

Almost surely, 2^27639493173 is an apocalyptic number.

It is an amenable number.

27639493173 is a deficient number, since it is larger than the sum of its proper divisors (16649519595).

27639493173 is a wasteful number, since it uses less digits than its factorization.

27639493173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5471 (or 5449 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 54.

The spelling of 27639493173 in words is "twenty-seven billion, six hundred thirty-nine million, four hundred ninety-three thousand, one hundred seventy-three".