27528173087 has 4 divisors (see below), whose sum is σ = 27529430760. Its totient is φ = 27526915416.

The previous prime is 27528173077. The next prime is 27528173089. The reversal of 27528173087 is 78037182572.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27528173087 - 2¹⁴ = 27528156703 is a prime.

It is a super-2 number, since 2×27528173087² (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 (27528173089) 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 3 ways as a sum of consecutive naturals, for example, 595412 + ... + 639977.

It is an arithmetic number, because the mean of its divisors is an integer number (6882357690).

Almost surely, 2^27528173087 is an apocalyptic number.

27528173087 is a deficient number, since it is larger than the sum of its proper divisors (1257673).

27528173087 is a wasteful number, since it uses less digits than its factorization.

27528173087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257672.

The product of its (nonzero) digits is 1317120, while the sum is 50.

The spelling of 27528173087 in words is "twenty-seven billion, five hundred twenty-eight million, one hundred seventy-three thousand, eighty-seven".