68336233745 has 16 divisors (see below), whose sum is σ = 88521241872. Its totient is φ = 50343793920.

The previous prime is 68336233741. The next prime is 68336233817. The reversal of 68336233745 is 54733263386.

It is a Cunningham number, because it is equal to 261412²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 13662570769 + 54673662976 = 116887^2 + 233824^2 .

It is not a de Polignac number, because 68336233745 - 2² = 68336233741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68336233693 and 68336233702.

It is not an unprimeable number, because it can be changed into a prime (68336233741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1221242 + ... + 1275971.

It is an arithmetic number, because the mean of its divisors is an integer number (5532577617).

Almost surely, 2^68336233745 is an apocalyptic number.

68336233745 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68336233745 is a deficient number, since it is larger than the sum of its proper divisors (20185008127).

68336233745 is a wasteful number, since it uses less digits than its factorization.

68336233745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497652.

The product of its digits is 6531840, while the sum is 50.

The spelling of 68336233745 in words is "sixty-eight billion, three hundred thirty-six million, two hundred thirty-three thousand, seven hundred forty-five".