68600515409 has 4 divisors (see below), whose sum is σ = 68750626404. Its totient is φ = 68450404416.

The previous prime is 68600515349. The next prime is 68600515427. The reversal of 68600515409 is 90451500686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60181902400 + 8418613009 = 245320^2 + 91753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68600515409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68600515409.

It is not an unprimeable number, because it can be changed into a prime (68600515309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75054812 + ... + 75055725.

It is an arithmetic number, because the mean of its divisors is an integer number (17187656601).

Almost surely, 2^68600515409 is an apocalyptic number.

It is an amenable number.

68600515409 is a deficient number, since it is larger than the sum of its proper divisors (150110995).

68600515409 is a wasteful number, since it uses less digits than its factorization.

68600515409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150110994.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 68600515409 in words is "sixty-eight billion, six hundred million, five hundred fifteen thousand, four hundred nine".