1728853163520 has 640 divisors, whose sum is σ = 6431052672000. Its totient is φ = 388038131712.

The previous prime is 1728853163449. The next prime is 1728853163581. The reversal of 1728853163520 is 253613588271.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (640).

It is a super-2 number, since 2×1728853163520² (a number of 25 digits) contains 22 as substring.

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 63 ways as a sum of consecutive naturals, for example, 1617261546 + ... + 1617262614.

It is an arithmetic number, because the mean of its divisors is an integer number (10048519800).

Almost surely, 2^{1728853163520} is an apocalyptic number.

1728853163520 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 1728853163520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3215526336000).

1728853163520 is an abundant number, since it is smaller than the sum of its proper divisors (4702199508480).

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

1728853163520 is a wasteful number, since it uses less digits than its factorization.

1728853163520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 1602 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 1728853163520 in words is "one trillion, seven hundred twenty-eight billion, eight hundred fifty-three million, one hundred sixty-three thousand, five hundred twenty".