27686726487 has 24 divisors (see below), whose sum is σ = 45716576256. Its totient is φ = 15817004496.

The previous prime is 27686726477. The next prime is 27686726497. The reversal of 27686726487 is 78462768672.

27686726487 is a `hidden beast` number, since 2 + 7 + 6 + 86 + 72 + 6 + 487 = 666.

It is an interprime number because it is at equal distance from previous prime (27686726477) and next prime (27686726497).

It is not a de Polignac number, because 27686726487 - 2¹⁹ = 27686202199 is a prime.

It is a super-2 number, since 2×27686726487² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27686726477) 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 23 ways as a sum of consecutive naturals, for example, 206758 + ... + 313244.

It is an arithmetic number, because the mean of its divisors is an integer number (1904857344).

Almost surely, 2^27686726487 is an apocalyptic number.

27686726487 is a deficient number, since it is larger than the sum of its proper divisors (18029849769).

27686726487 is a wasteful number, since it uses less digits than its factorization.

27686726487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110627 (or 110624 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 63.

The spelling of 27686726487 in words is "twenty-seven billion, six hundred eighty-six million, seven hundred twenty-six thousand, four hundred eighty-seven".