13278357843 has 4 divisors (see below), whose sum is σ = 17704477128. Its totient is φ = 8852238560.

The previous prime is 13278357761. The next prime is 13278357853. The reversal of 13278357843 is 34875387231.

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

It is a cyclic number.

It is not a de Polignac number, because 13278357843 - 2¹² = 13278353747 is a prime.

It is a super-2 number, since 2×13278357843² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13278357853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2213059638 + ... + 2213059643.

It is an arithmetic number, because the mean of its divisors is an integer number (4426119282).

Almost surely, 2^13278357843 is an apocalyptic number.

13278357843 is a deficient number, since it is larger than the sum of its proper divisors (4426119285).

13278357843 is an equidigital number, since it uses as much as digits as its factorization.

13278357843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426119284.

The product of its digits is 3386880, while the sum is 51.

The spelling of 13278357843 in words is "thirteen billion, two hundred seventy-eight million, three hundred fifty-seven thousand, eight hundred forty-three".