2678436720268 has 6 divisors (see below), whose sum is σ = 4687264260476. Its totient is φ = 1339218360132.

The previous prime is 2678436720259. The next prime is 2678436720269. The reversal of 2678436720268 is 8620276348762.

It is not an unprimeable number, because it can be changed into a prime (2678436720269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334804590030 + ... + 334804590037.

Almost surely, 2^{2678436720268} is an apocalyptic number.

It is an amenable number.

2678436720268 is a deficient number, since it is larger than the sum of its proper divisors (2008827540208).

2678436720268 is a wasteful number, since it uses less digits than its factorization.

2678436720268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669609180071 (or 669609180069 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 61.

The spelling of 2678436720268 in words is "two trillion, six hundred seventy-eight billion, four hundred thirty-six million, seven hundred twenty thousand, two hundred sixty-eight".