16523280453120 has 320 divisors, whose sum is σ = 61841407896576. Its totient is φ = 3684633477120.

The previous prime is 16523280453109. The next prime is 16523280453137. The reversal of 16523280453120 is 2135408232561.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1544044 + ... + 5952363.

Almost surely, 2^{16523280453120} is an apocalyptic number.

16523280453120 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 16523280453120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30920703948288).

16523280453120 is an abundant number, since it is smaller than the sum of its proper divisors (45318127443456).

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

16523280453120 is an equidigital number, since it uses as much as digits as its factorization.

16523280453120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7496481 (or 7496465 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

Adding to 16523280453120 its reverse (2135408232561), we get a palindrome (18658688685681).

The spelling of 16523280453120 in words is "sixteen trillion, five hundred twenty-three billion, two hundred eighty million, four hundred fifty-three thousand, one hundred twenty".