865876606641 has 12 divisors (see below), whose sum is σ = 1251013616580. Its totient is φ = 577111242240.

The previous prime is 865876606633. The next prime is 865876606643. The reversal of 865876606641 is 146606678568.

865876606641 is a `hidden beast` number, since 8 + 6 + 587 + 6 + 6 + 0 + 6 + 6 + 41 = 666.

865876606641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 565397221041 + 300479385600 = 751929^2 + 548160^2 .

It is not a de Polignac number, because 865876606641 - 2³ = 865876606633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (865876606643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11613180 + ... + 11687501.

It is an arithmetic number, because the mean of its divisors is an integer number (104251134715).

Almost surely, 2^865876606641 is an apocalyptic number.

It is an amenable number.

865876606641 is a deficient number, since it is larger than the sum of its proper divisors (385137009939).

865876606641 is a wasteful number, since it uses less digits than its factorization.

865876606641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23304816 (or 23304813 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 63.

The spelling of 865876606641 in words is "eight hundred sixty-five billion, eight hundred seventy-six million, six hundred six thousand, six hundred forty-one".