13139113440 has 96 divisors (see below), whose sum is σ = 41453548416. Its totient is φ = 3498232320.

The previous prime is 13139113397. The next prime is 13139113451. The reversal of 13139113440 is 4431193131.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 13139113398 and 13139113407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287355 + ... + 329925.

It is an arithmetic number, because the mean of its divisors is an integer number (431807796).

Almost surely, 2^13139113440 is an apocalyptic number.

13139113440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13139113440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20726774208).

13139113440 is an abundant number, since it is smaller than the sum of its proper divisors (28314434976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13139113440 is a wasteful number, since it uses less digits than its factorization.

13139113440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43232 (or 43224 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The spelling of 13139113440 in words is "thirteen billion, one hundred thirty-nine million, one hundred thirteen thousand, four hundred forty".