68721523433 has 2 divisors, whose sum is σ = 68721523434. Its totient is φ = 68721523432.

The previous prime is 68721523417. The next prime is 68721523459. The reversal of 68721523433 is 33432512786.

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., 51262393744 + 17459129689 = 226412^2 + 132133^2 .

It is a cyclic number.

It is not a de Polignac number, because 68721523433 - 2⁴ = 68721523417 is a prime.

It is not a weakly prime, because it can be changed into another prime (68721523463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34360761716 + 34360761717.

It is an arithmetic number, because the mean of its divisors is an integer number (34360761717).

Almost surely, 2^68721523433 is an apocalyptic number.

It is an amenable number.

68721523433 is a deficient number, since it is larger than the sum of its proper divisors (1).

68721523433 is an equidigital number, since it uses as much as digits as its factorization.

68721523433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 44.

The spelling of 68721523433 in words is "sixty-eight billion, seven hundred twenty-one million, five hundred twenty-three thousand, four hundred thirty-three".