15520450000 has 120 divisors (see below), whose sum is σ = 41004563040. Its totient is φ = 5643600000.

The previous prime is 15520449961. The next prime is 15520450009. The reversal of 15520450000 is 5402551.

15520450000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15520450009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 535891 + ... + 564109.

It is an arithmetic number, because the mean of its divisors is an integer number (341704692).

Almost surely, 2^15520450000 is an apocalyptic number.

15520450000 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 15520450000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20502281520).

15520450000 is an abundant number, since it is smaller than the sum of its proper divisors (25484113040).

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

15520450000 is an equidigital number, since it uses as much as digits as its factorization.

15520450000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28263 (or 28237 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

Adding to 15520450000 its reverse (5402551), we get a palindrome (15525852551).

The spelling of 15520450000 in words is "fifteen billion, five hundred twenty million, four hundred fifty thousand".