868736528261 has 16 divisors (see below), whose sum is σ = 1029095625600. Its totient is φ = 717541798848.

The previous prime is 868736528239. The next prime is 868736528293. The reversal of 868736528261 is 162825637868.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-868736528261 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 868736528194 and 868736528203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868736528201) 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, 4100495 + ... + 4307148.

It is an arithmetic number, because the mean of its divisors is an integer number (64318476600).

Almost surely, 2^868736528261 is an apocalyptic number.

It is an amenable number.

868736528261 is a deficient number, since it is larger than the sum of its proper divisors (160359097339).

868736528261 is a wasteful number, since it uses less digits than its factorization.

868736528261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8408188.

The product of its digits is 46448640, while the sum is 62.

The spelling of 868736528261 in words is "eight hundred sixty-eight billion, seven hundred thirty-six million, five hundred twenty-eight thousand, two hundred sixty-one".