27777675487 has 16 divisors (see below), whose sum is σ = 29780805600. Its totient is φ = 25815877632.

The previous prime is 27777675473. The next prime is 27777675517. The reversal of 27777675487 is 78457677772.

It is a cyclic number.

It is not a de Polignac number, because 27777675487 - 2¹¹ = 27777673439 is a prime.

It is a super-2 number, since 2×27777675487² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27777675467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3993889 + ... + 4000837.

It is an arithmetic number, because the mean of its divisors is an integer number (1861300350).

Almost surely, 2^27777675487 is an apocalyptic number.

27777675487 is a deficient number, since it is larger than the sum of its proper divisors (2003130113).

27777675487 is a wasteful number, since it uses less digits than its factorization.

27777675487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9882.

The product of its digits is 225886080, while the sum is 67.

The spelling of 27777675487 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred seventy-five thousand, four hundred eighty-seven".