68123963653 has 2 divisors, whose sum is σ = 68123963654. Its totient is φ = 68123963652.

The previous prime is 68123963651. The next prime is 68123963693. The reversal of 68123963653 is 35636932186.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37611559969 + 30512403684 = 193937^2 + 174678^2 .

It is a cyclic number.

It is not a de Polignac number, because 68123963653 - 2¹ = 68123963651 is a prime.

Together with 68123963651, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 68123963653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68123963651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34061981826 + 34061981827.

It is an arithmetic number, because the mean of its divisors is an integer number (34061981827).

Almost surely, 2^68123963653 is an apocalyptic number.

It is an amenable number.

68123963653 is a deficient number, since it is larger than the sum of its proper divisors (1).

68123963653 is an equidigital number, since it uses as much as digits as its factorization.

68123963653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 52.

The spelling of 68123963653 in words is "sixty-eight billion, one hundred twenty-three million, nine hundred sixty-three thousand, six hundred fifty-three".