13426866857 has 6 divisors (see below), whose sum is σ = 14170737978. Its totient is φ = 12720189312.

The previous prime is 13426866839. The next prime is 13426866881. The reversal of 13426866857 is 75866862431.

It can be written as a sum of positive squares in only one way, i.e., 8540717056 + 4886149801 = 92416^2 + 69901^2 .

It is not a de Polignac number, because 13426866857 - 2¹⁴ = 13426850473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13426862857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18596408 + ... + 18597129.

It is an arithmetic number, because the mean of its divisors is an integer number (2361789663).

Almost surely, 2^13426866857 is an apocalyptic number.

It is an amenable number.

13426866857 is a deficient number, since it is larger than the sum of its proper divisors (743871121).

13426866857 is an equidigital number, since it uses as much as digits as its factorization.

13426866857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37193575 (or 37193556 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 56.

The spelling of 13426866857 in words is "thirteen billion, four hundred twenty-six million, eight hundred sixty-six thousand, eight hundred fifty-seven".