15505451520000 has 520 divisors, whose sum is σ = 55636349719104. Its totient is φ = 3816701952000.

The previous prime is 15505451519939. The next prime is 15505451520011. The reversal of 15505451520000 is 2515450551.

It is a tau number, because it is divible by the number of its divisors (520).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 99762349 + ... + 99917651.

Almost surely, 2^{15505451520000} is an apocalyptic number.

15505451520000 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 15505451520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27818174859552).

15505451520000 is an abundant number, since it is smaller than the sum of its proper divisors (40130898199104).

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

15505451520000 is an equidigital number, since it uses as much as digits as its factorization.

15505451520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155363 (or 155326 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 33.

Adding to 15505451520000 its reverse (2515450551), we get a palindrome (15507966970551).

The spelling of 15505451520000 in words is "fifteen trillion, five hundred five billion, four hundred fifty-one million, five hundred twenty thousand".