68278253783858 has 8 divisors (see below), whose sum is σ = 102434890931100. Its totient is φ = 34133290140160.

The previous prime is 68278253783843. The next prime is 68278253783869. The reversal of 68278253783858 is 85838735287286.

It can be written as a sum of positive squares in 2 ways, for example, as 57529448923489 + 10748804860369 = 7584817^2 + 3278537^2 .

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

It is a Curzon 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, 2918361263 + ... + 2918384658.

Almost surely, 2^{68278253783858} is an apocalyptic number.

68278253783858 is a deficient number, since it is larger than the sum of its proper divisors (34156637147242).

68278253783858 is a wasteful number, since it uses less digits than its factorization.

68278253783858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5836751772.

The product of its digits is 8670412800, while the sum is 80.

The spelling of 68278253783858 in words is "sixty-eight trillion, two hundred seventy-eight billion, two hundred fifty-three million, seven hundred eighty-three thousand, eight hundred fifty-eight".