6868218745 has 4 divisors (see below), whose sum is σ = 8241862500. Its totient is φ = 5494574992.

The previous prime is 6868218737. The next prime is 6868218751. The reversal of 6868218745 is 5478128686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5478128686 = 2 ⋅2739064343.

It can be written as a sum of positive squares in 2 ways, for example, as 5396959296 + 1471259449 = 73464^2 + 38357^2 .

It is a cyclic number.

It is not a de Polignac number, because 6868218745 - 2³ = 6868218737 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686821870 + ... + 686821879.

It is an arithmetic number, because the mean of its divisors is an integer number (2060465625).

Almost surely, 2^6868218745 is an apocalyptic number.

It is an amenable number.

6868218745 is a deficient number, since it is larger than the sum of its proper divisors (1373643755).

6868218745 is a wasteful number, since it uses less digits than its factorization.

6868218745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373643754.

The product of its digits is 5160960, while the sum is 55.

The square root of 6868218745 is about 82874.7171639216. The cubic root of 6868218745 is about 1900.8508419180.

The spelling of 6868218745 in words is "six billion, eight hundred sixty-eight million, two hundred eighteen thousand, seven hundred forty-five".