873655581 has 16 divisors (see below), whose sum is σ = 1201662144. Its totient is φ = 564182784.

The previous prime is 873655567. The next prime is 873655589. The reversal of 873655581 is 185556378.

873655581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 873655581 - 2²⁵ = 840101149 is a prime.

It is a super-2 number, since 2×873655581² = 1526548148424895122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 873655581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873655589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7861 + ... + 42533.

It is an arithmetic number, because the mean of its divisors is an integer number (75103884).

Almost surely, 2^873655581 is an apocalyptic number.

It is an amenable number.

873655581 is a deficient number, since it is larger than the sum of its proper divisors (328006563).

873655581 is a wasteful number, since it uses less digits than its factorization.

873655581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34940.

The product of its digits is 1008000, while the sum is 48.

The square root of 873655581 is about 29557.6653509711. The cubic root of 873655581 is about 955.9754772308.

The spelling of 873655581 in words is "eight hundred seventy-three million, six hundred fifty-five thousand, five hundred eighty-one".