87565500181 has 4 divisors (see below), whose sum is σ = 87575692000. Its totient is φ = 87555308364.

The previous prime is 87565500167. The next prime is 87565500199. The reversal of 87565500181 is 18100556578.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87565500181 - 2⁵ = 87565500149 is a prime.

It is a super-2 number, since 2×87565500181² (a number of 23 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 (87565510181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5083011 + ... + 5100208.

It is an arithmetic number, because the mean of its divisors is an integer number (21893923000).

Almost surely, 2^87565500181 is an apocalyptic number.

It is an amenable number.

87565500181 is a deficient number, since it is larger than the sum of its proper divisors (10191819).

87565500181 is a wasteful number, since it uses less digits than its factorization.

87565500181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10191818.

The product of its (nonzero) digits is 336000, while the sum is 46.

The spelling of 87565500181 in words is "eighty-seven billion, five hundred sixty-five million, five hundred thousand, one hundred eighty-one".