15520454400000 has 1152 divisors, whose sum is σ = 57766515206400. Its totient is φ = 3672883200000.

The previous prime is 15520454399993. The next prime is 15520454400001. The reversal of 15520454400000 is 445402551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15520454400001) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 9081599146 + ... + 9081600854.

It is an arithmetic number, because the mean of its divisors is an integer number (50144544450).

Almost surely, 2^{15520454400000} is an apocalyptic number.

15520454400000 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 15520454400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28883257603200).

15520454400000 is an abundant number, since it is smaller than the sum of its proper divisors (42246060806400).

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

15520454400000 is an equidigital number, since it uses as much as digits as its factorization.

15520454400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813 (or 1773 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

Adding to 15520454400000 its reverse (445402551), we get a palindrome (15520899802551).

The spelling of 15520454400000 in words is "fifteen trillion, five hundred twenty billion, four hundred fifty-four million, four hundred thousand".