87518985571 has 4 divisors (see below), whose sum is σ = 87525502632. Its totient is φ = 87512468512.

The previous prime is 87518985517. The next prime is 87518985577. The reversal of 87518985571 is 17558981578.

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 87518985571 - 2¹¹ = 87518983523 is a prime.

It is a super-3 number, since 3×87518985571³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87518985577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3238345 + ... + 3265258.

It is an arithmetic number, because the mean of its divisors is an integer number (21881375658).

Almost surely, 2^87518985571 is an apocalyptic number.

87518985571 is a deficient number, since it is larger than the sum of its proper divisors (6517061).

87518985571 is a wasteful number, since it uses less digits than its factorization.

87518985571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6517060.

The product of its digits is 28224000, while the sum is 64.

The spelling of 87518985571 in words is "eighty-seven billion, five hundred eighteen million, nine hundred eighty-five thousand, five hundred seventy-one".