68011283621 has 2 divisors, whose sum is σ = 68011283622. Its totient is φ = 68011283620.

The previous prime is 68011283603. The next prime is 68011283623. The reversal of 68011283621 is 12638211086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67763378596 + 247905025 = 260314^2 + 15745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68011283621 is a prime.

It is a super-2 number, since 2×68011283621² (a number of 22 digits) contains 22 as substring.

Together with 68011283623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68011283623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34005641810 + 34005641811.

It is an arithmetic number, because the mean of its divisors is an integer number (34005641811).

Almost surely, 2^68011283621 is an apocalyptic number.

It is an amenable number.

68011283621 is a deficient number, since it is larger than the sum of its proper divisors (1).

68011283621 is an equidigital number, since it uses as much as digits as its factorization.

68011283621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 68011283621 in words is "sixty-eight billion, eleven million, two hundred eighty-three thousand, six hundred twenty-one".