13138169856 has 208 divisors, whose sum is σ = 42147609600. Its totient is φ = 3555753984.

The previous prime is 13138169843. The next prime is 13138169873. The reversal of 13138169856 is 65896183131.

It is a super-2 number, since 2×13138169856² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13138169799 and 13138169808.

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, 1630285 + ... + 1638323.

Almost surely, 2^13138169856 is an apocalyptic number.

13138169856 is a gapful number since it is divisible by the number (16) 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 13138169856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21073804800).

13138169856 is an abundant number, since it is smaller than the sum of its proper divisors (29009439744).

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

13138169856 is an equidigital number, since it uses as much as digits as its factorization.

13138169856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8092 (or 8070 counting only the distinct ones).

The product of its digits is 933120, while the sum is 51.

The spelling of 13138169856 in words is "thirteen billion, one hundred thirty-eight million, one hundred sixty-nine thousand, eight hundred fifty-six".