887158655881 has 9 divisors (see below), whose sum is σ = 918833509191. Its totient is φ = 856540605144.

The previous prime is 887158655813. The next prime is 887158655891. The reversal of 887158655881 is 188556851788.

The square root of 887158655881 is 941891.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 465204479481 + 421954176400 = 682059^2 + 649580^2 .

It is not a de Polignac number, because 887158655881 - 2²⁹ = 886621784969 is a prime.

It is a super-2 number, since 2×887158655881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 887158655881.

It is not an unprimeable number, because it can be changed into a prime (887158655891) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27298600 + ... + 27331078.

Almost surely, 2^887158655881 is an apocalyptic number.

887158655881 is the 941891-st square number.

887158655881 is the 470946-th centered octagonal number.

It is an amenable number.

887158655881 is a deficient number, since it is larger than the sum of its proper divisors (31674853310).

887158655881 is an frugal number, since it uses more digits than its factorization.

887158655881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65016 (or 32508 counting only the distinct ones).

The product of its digits is 172032000, while the sum is 70.

The spelling of 887158655881 in words is "eight hundred eighty-seven billion, one hundred fifty-eight million, six hundred fifty-five thousand, eight hundred eighty-one".