868536619129 has 2 divisors, whose sum is σ = 868536619130. Its totient is φ = 868536619128.

The previous prime is 868536619127. The next prime is 868536619133. The reversal of 868536619129 is 921916635868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 830425770729 + 38110848400 = 911277^2 + 195220^2 .

It is a cyclic number.

It is not a de Polignac number, because 868536619129 - 2¹ = 868536619127 is a prime.

Together with 868536619127, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (868536619127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434268309564 + 434268309565.

It is an arithmetic number, because the mean of its divisors is an integer number (434268309565).

Almost surely, 2^868536619129 is an apocalyptic number.

It is an amenable number.

868536619129 is a deficient number, since it is larger than the sum of its proper divisors (1).

868536619129 is an equidigital number, since it uses as much as digits as its factorization.

868536619129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33592320, while the sum is 64.

It can be divided in two parts, 86853661 and 9129, that added together give a triangular number (86862790 = T₁₃₁₈₀).

The spelling of 868536619129 in words is "eight hundred sixty-eight billion, five hundred thirty-six million, six hundred nineteen thousand, one hundred twenty-nine".