868580026109 has 2 divisors, whose sum is σ = 868580026110. Its totient is φ = 868580026108.

The previous prime is 868580025949. The next prime is 868580026133. The reversal of 868580026109 is 901620085868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 864940920484 + 3639105625 = 930022^2 + 60325^2 .

It is a cyclic number.

It is not a de Polignac number, because 868580026109 - 2²⁴ = 868563248893 is a prime.

It is a super-2 number, since 2×868580026109² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868580026159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434290013054 + 434290013055.

It is an arithmetic number, because the mean of its divisors is an integer number (434290013055).

Almost surely, 2^868580026109 is an apocalyptic number.

It is an amenable number.

868580026109 is a deficient number, since it is larger than the sum of its proper divisors (1).

868580026109 is an equidigital number, since it uses as much as digits as its factorization.

868580026109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 868580026109 in words is "eight hundred sixty-eight billion, five hundred eighty million, twenty-six thousand, one hundred nine".