87551360881 has 4 divisors (see below), whose sum is σ = 87583874292. Its totient is φ = 87518847472.

The previous prime is 87551360879. The next prime is 87551360891. The reversal of 87551360881 is 18806315578.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27219720256 + 60331640625 = 164984^2 + 245625^2 .

It is a cyclic number.

It is not a de Polignac number, because 87551360881 - 2¹ = 87551360879 is a prime.

It is a super-2 number, since 2×87551360881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87551360891) 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, 16252666 + ... + 16258051.

It is an arithmetic number, because the mean of its divisors is an integer number (21895968573).

Almost surely, 2^87551360881 is an apocalyptic number.

It is an amenable number.

87551360881 is a deficient number, since it is larger than the sum of its proper divisors (32513411).

87551360881 is a wasteful number, since it uses less digits than its factorization.

87551360881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32513410.

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 87551360881 in words is "eighty-seven billion, five hundred fifty-one million, three hundred sixty thousand, eight hundred eighty-one".