113878448639 has 4 divisors (see below), whose sum is σ = 113879530200. Its totient is φ = 113877367080.

The previous prime is 113878448611. The next prime is 113878448681. The reversal of 113878448639 is 936844878311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 936844878311 = 18049 ⋅51905639.

It is a cyclic number.

It is not a de Polignac number, because 113878448639 - 2²⁸ = 113610013183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113878448339) 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, 363464 + ... + 599885.

It is an arithmetic number, because the mean of its divisors is an integer number (28469882550).

Almost surely, 2^113878448639 is an apocalyptic number.

113878448639 is a deficient number, since it is larger than the sum of its proper divisors (1081561).

113878448639 is an equidigital number, since it uses as much as digits as its factorization.

113878448639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081560.

The product of its digits is 27869184, while the sum is 62.

The spelling of 113878448639 in words is "one hundred thirteen billion, eight hundred seventy-eight million, four hundred forty-eight thousand, six hundred thirty-nine".