268710815845 has 4 divisors (see below), whose sum is σ = 322452979020. Its totient is φ = 214968652672.

The previous prime is 268710815803. The next prime is 268710815869. The reversal of 268710815845 is 548518017862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548518017862 = 2 ⋅274259008931.

It can be written as a sum of positive squares in 2 ways, for example, as 33503275521 + 235207540324 = 183039^2 + 484982^2 .

It is a cyclic number.

It is not a de Polignac number, because 268710815845 - 2¹¹ = 268710813797 is a prime.

It is a congruent 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, 26871081580 + ... + 26871081589.

It is an arithmetic number, because the mean of its divisors is an integer number (80613244755).

Almost surely, 2^268710815845 is an apocalyptic number.

It is an amenable number.

268710815845 is a deficient number, since it is larger than the sum of its proper divisors (53742163175).

268710815845 is an equidigital number, since it uses as much as digits as its factorization.

268710815845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53742163174.

The product of its (nonzero) digits is 4300800, while the sum is 55.

The spelling of 268710815845 in words is "two hundred sixty-eight billion, seven hundred ten million, eight hundred fifteen thousand, eight hundred forty-five".