2678418368345 has 4 divisors (see below), whose sum is σ = 3214102042020. Its totient is φ = 2142734694672.

The previous prime is 2678418368321. The next prime is 2678418368359. The reversal of 2678418368345 is 5438638148762.

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 2097364339984 + 581054028361 = 1448228^2 + 762269^2 .

It is a cyclic number.

It is not a de Polignac number, because 2678418368345 - 2³² = 2674123401049 is a prime.

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, 267841836830 + ... + 267841836839.

It is an arithmetic number, because the mean of its divisors is an integer number (803525510505).

Almost surely, 2^{2678418368345} is an apocalyptic number.

It is an amenable number.

2678418368345 is a deficient number, since it is larger than the sum of its proper divisors (535683673675).

2678418368345 is an equidigital number, since it uses as much as digits as its factorization.

2678418368345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535683673674.

The product of its digits is 185794560, while the sum is 65.

The spelling of 2678418368345 in words is "two trillion, six hundred seventy-eight billion, four hundred eighteen million, three hundred sixty-eight thousand, three hundred forty-five".