868418813641 has 2 divisors, whose sum is σ = 868418813642. Its totient is φ = 868418813640.

The previous prime is 868418813579. The next prime is 868418813671. The reversal of 868418813641 is 146318814868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 607932090000 + 260486723641 = 779700^2 + 510379^2 .

It is a cyclic number.

It is not a de Polignac number, because 868418813641 - 2²⁹ = 867881942729 is a prime.

It is not a weakly prime, because it can be changed into another prime (868418813671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434209406820 + 434209406821.

It is an arithmetic number, because the mean of its divisors is an integer number (434209406821).

Almost surely, 2^868418813641 is an apocalyptic number.

It is an amenable number.

868418813641 is a deficient number, since it is larger than the sum of its proper divisors (1).

868418813641 is an equidigital number, since it uses as much as digits as its factorization.

868418813641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7077888, while the sum is 58.

The spelling of 868418813641 in words is "eight hundred sixty-eight billion, four hundred eighteen million, eight hundred thirteen thousand, six hundred forty-one".