15559481472 has 128 divisors (see below), whose sum is σ = 44196192000. Its totient is φ = 4832870400.

The previous prime is 15559481453. The next prime is 15559481473. The reversal of 15559481472 is 27418495551.

15559481472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-4 number, since 4×15559481472⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (15559481473) 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 15 ways as a sum of consecutive naturals, for example, 647529 + ... + 671127.

It is an arithmetic number, because the mean of its divisors is an integer number (345282750).

Almost surely, 2^15559481472 is an apocalyptic number.

15559481472 is a gapful number since it is divisible by the number (12) 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 15559481472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22098096000).

15559481472 is an abundant number, since it is smaller than the sum of its proper divisors (28636710528).

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

15559481472 is a wasteful number, since it uses less digits than its factorization.

15559481472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23734 (or 23722 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 51.

The spelling of 15559481472 in words is "fifteen billion, five hundred fifty-nine million, four hundred eighty-one thousand, four hundred seventy-two".