68726264309 has 8 divisors (see below), whose sum is σ = 70445590488. Its totient is φ = 67008989440.

The previous prime is 68726264287. The next prime is 68726264317. The reversal of 68726264309 is 90346262786.

It can be written as a sum of positive squares in 4 ways, for example, as 227859025 + 68498405284 = 15095^2 + 261722^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68726264309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68726264329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444872 + ... + 579105.

It is an arithmetic number, because the mean of its divisors is an integer number (8805698811).

Almost surely, 2^68726264309 is an apocalyptic number.

It is an amenable number.

68726264309 is a deficient number, since it is larger than the sum of its proper divisors (1719326179).

68726264309 is a wasteful number, since it uses less digits than its factorization.

68726264309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025655.

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 68726264309 in words is "sixty-eight billion, seven hundred twenty-six million, two hundred sixty-four thousand, three hundred nine".