68783645858 has 16 divisors (see below), whose sum is σ = 103846913784. Its totient is φ = 34168068480.

The previous prime is 68783645849. The next prime is 68783645863. The reversal of 68783645858 is 85854638786.

It can be written as a sum of positive squares in 4 ways, for example, as 68211335929 + 572309929 = 261173^2 + 23923^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3847316 + ... + 3865152.

Almost surely, 2^68783645858 is an apocalyptic number.

68783645858 is a deficient number, since it is larger than the sum of its proper divisors (35063267926).

68783645858 is a wasteful number, since it uses less digits than its factorization.

68783645858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30277.

The product of its digits is 309657600, while the sum is 68.

The spelling of 68783645858 in words is "sixty-eight billion, seven hundred eighty-three million, six hundred forty-five thousand, eight hundred fifty-eight".