87136855287 has 4 divisors (see below), whose sum is σ = 116182473720. Its totient is φ = 58091236856.

The previous prime is 87136855261. The next prime is 87136855297. The reversal of 87136855287 is 78255863178.

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 87136855287 - 2¹⁴ = 87136838903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87136855287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87136855297) 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, 14522809212 + ... + 14522809217.

It is an arithmetic number, because the mean of its divisors is an integer number (29045618430).

Almost surely, 2^87136855287 is an apocalyptic number.

87136855287 is a deficient number, since it is larger than the sum of its proper divisors (29045618433).

87136855287 is a wasteful number, since it uses less digits than its factorization.

87136855287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29045618432.

The product of its digits is 22579200, while the sum is 60.

The spelling of 87136855287 in words is "eighty-seven billion, one hundred thirty-six million, eight hundred fifty-five thousand, two hundred eighty-seven".