68506127845 has 4 divisors (see below), whose sum is σ = 82207353420. Its totient is φ = 54804902272.

The previous prime is 68506127819. The next prime is 68506127861. The reversal of 68506127845 is 54872160586.

It is a happy number.

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 47566301409 + 20939826436 = 218097^2 + 144706^2 .

It is a cyclic number.

It is not a de Polignac number, because 68506127845 - 2⁵ = 68506127813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68506127792 and 68506127801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6850612780 + ... + 6850612789.

It is an arithmetic number, because the mean of its divisors is an integer number (20551838355).

Almost surely, 2^68506127845 is an apocalyptic number.

It is an amenable number.

68506127845 is a deficient number, since it is larger than the sum of its proper divisors (13701225575).

68506127845 is a wasteful number, since it uses less digits than its factorization.

68506127845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13701225574.

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 68506127845 in words is "sixty-eight billion, five hundred six million, one hundred twenty-seven thousand, eight hundred forty-five".