16533343665488 has 80 divisors (see below), whose sum is σ = 34782452686800. Its totient is φ = 7567840002048.

The previous prime is 16533343665457. The next prime is 16533343665541. The reversal of 16533343665488 is 88456634333561.

It can be written as a sum of positive squares in 8 ways, for example, as 267835230784 + 16265508434704 = 517528^2 + 4033052^2 .

It is a super-2 number, since 2×16533343665488² (a number of 27 digits) contains 22 as substring.

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, 29615756 + ... + 30168852.

It is an arithmetic number, because the mean of its divisors is an integer number (434780658585).

Almost surely, 2^{16533343665488} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16533343665488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17391226343400).

16533343665488 is an abundant number, since it is smaller than the sum of its proper divisors (18249109021312).

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

16533343665488 is a wasteful number, since it uses less digits than its factorization.

16533343665488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554304 (or 554298 counting only the distinct ones).

The product of its digits is 447897600, while the sum is 65.

The spelling of 16533343665488 in words is "sixteen trillion, five hundred thirty-three billion, three hundred forty-three million, six hundred sixty-five thousand, four hundred eighty-eight".