13855381000 has 64 divisors (see below), whose sum is σ = 32655168000. Its totient is φ = 5502225600.

The previous prime is 13855380989. The next prime is 13855381013. The reversal of 13855381000 is 18355831.

It is a super-2 number, since 2×13855381000² (a number of 21 digits) contains 22 as substring.

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, 89161 + ... + 188839.

It is an arithmetic number, because the mean of its divisors is an integer number (510237000).

Almost surely, 2^13855381000 is an apocalyptic number.

13855381000 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 13855381000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16327584000).

13855381000 is an abundant number, since it is smaller than the sum of its proper divisors (18799787000).

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

13855381000 is a wasteful number, since it uses less digits than its factorization.

13855381000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99839 (or 99825 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 13855381000 in words is "thirteen billion, eight hundred fifty-five million, three hundred eighty-one thousand".