68646620011 has 2 divisors, whose sum is σ = 68646620012. Its totient is φ = 68646620010.

The previous prime is 68646619997. The next prime is 68646620033. The reversal of 68646620011 is 11002664686.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68646620011 is a prime.

It is not a weakly prime, because it can be changed into another prime (68646620411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34323310005 + 34323310006.

It is an arithmetic number, because the mean of its divisors is an integer number (34323310006).

Almost surely, 2^68646620011 is an apocalyptic number.

68646620011 is a deficient number, since it is larger than the sum of its proper divisors (1).

68646620011 is an equidigital number, since it uses as much as digits as its factorization.

68646620011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 68646620011 in words is "sixty-eight billion, six hundred forty-six million, six hundred twenty thousand, eleven".