268378015018 has 4 divisors (see below), whose sum is σ = 402567022530. Its totient is φ = 134189007508.

The previous prime is 268378014979. The next prime is 268378015033. The reversal of 268378015018 is 810510873862.

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

It can be written as a sum of positive squares in only one way, i.e., 226407527329 + 41970487689 = 475823^2 + 204867^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67094503753 + ... + 67094503756.

Almost surely, 2^268378015018 is an apocalyptic number.

268378015018 is a deficient number, since it is larger than the sum of its proper divisors (134189007512).

268378015018 is a wasteful number, since it uses less digits than its factorization.

268378015018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134189007511.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 268378015018 in words is "two hundred sixty-eight billion, three hundred seventy-eight million, fifteen thousand, eighteen".