68516702785730 has 8 divisors (see below), whose sum is σ = 123330065014332. Its totient is φ = 27406681114288.

The previous prime is 68516702785709. The next prime is 68516702785733. The reversal of 68516702785730 is 3758720761586.

It can be written as a sum of positive squares in 2 ways, for example, as 68128136316529 + 388566469201 = 8253977^2 + 623351^2 .

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

It is a super-2 number, since 2×68516702785730² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68516702785733) 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, 3425835139277 + ... + 3425835139296.

Almost surely, 2^{68516702785730} is an apocalyptic number.

68516702785730 is a deficient number, since it is larger than the sum of its proper divisors (54813362228602).

68516702785730 is a wasteful number, since it uses less digits than its factorization.

68516702785730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6851670278580.

The product of its (nonzero) digits is 118540800, while the sum is 65.

The spelling of 68516702785730 in words is "sixty-eight trillion, five hundred sixteen billion, seven hundred two million, seven hundred eighty-five thousand, seven hundred thirty".