13478820859 has 4 divisors (see below), whose sum is σ = 15404366704. Its totient is φ = 11553275016.

The previous prime is 13478820853. The next prime is 13478820871. The reversal of 13478820859 is 95802887431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95802887431 = 41 ⋅2336655791.

It is a cyclic number.

It is not a de Polignac number, because 13478820859 - 2³ = 13478820851 is a prime.

It is a super-2 number, since 2×13478820859² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13478820851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 962772912 + ... + 962772925.

It is an arithmetic number, because the mean of its divisors is an integer number (3851091676).

Almost surely, 2^13478820859 is an apocalyptic number.

13478820859 is a deficient number, since it is larger than the sum of its proper divisors (1925545845).

13478820859 is an equidigital number, since it uses as much as digits as its factorization.

13478820859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925545844.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 13478820859 in words is "thirteen billion, four hundred seventy-eight million, eight hundred twenty thousand, eight hundred fifty-nine".