13530544398 has 160 divisors (see below), whose sum is σ = 35675640000. Its totient is φ = 3752386560.

The previous prime is 13530544373. The next prime is 13530544429. The reversal of 13530544398 is 89344503531.

13530544398 is a `hidden beast` number, since 13 + 5 + 3 + 0 + 544 + 3 + 98 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 10832478 + ... + 10833726.

It is an arithmetic number, because the mean of its divisors is an integer number (222972750).

Almost surely, 2^13530544398 is an apocalyptic number.

13530544398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13530544398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17837820000).

13530544398 is an abundant number, since it is smaller than the sum of its proper divisors (22145095602).

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

13530544398 is a wasteful number, since it uses less digits than its factorization.

13530544398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544 (or 1535 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 13530544398 in words is "thirteen billion, five hundred thirty million, five hundred forty-four thousand, three hundred ninety-eight".