13449528778180 has 96 divisors (see below), whose sum is σ = 31880088656640. Its totient is φ = 4721207124480.

The previous prime is 13449528778171. The next prime is 13449528778183. The reversal of 13449528778180 is 8187782594431.

It is a super-2 number, since 2×13449528778180² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13449528778183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34340217 + ... + 34729663.

It is an arithmetic number, because the mean of its divisors is an integer number (332084256840).

Almost surely, 2^{13449528778180} is an apocalyptic number.

13449528778180 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 13449528778180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15940044328320).

13449528778180 is an abundant number, since it is smaller than the sum of its proper divisors (18430559878460).

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

13449528778180 is a wasteful number, since it uses less digits than its factorization.

13449528778180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394909 (or 394907 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 67.

The spelling of 13449528778180 in words is "thirteen trillion, four hundred forty-nine billion, five hundred twenty-eight million, seven hundred seventy-eight thousand, one hundred eighty".