15543120240 has 320 divisors, whose sum is σ = 56917785600. Its totient is φ = 3887502336.

The previous prime is 15543120181. The next prime is 15543120317. The reversal of 15543120240 is 4202134551.

15543120240 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 (27).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 4225282 + ... + 4228958.

It is an arithmetic number, because the mean of its divisors is an integer number (177868080).

Almost surely, 2^15543120240 is an apocalyptic number.

15543120240 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 15543120240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28458892800).

15543120240 is an abundant number, since it is smaller than the sum of its proper divisors (41374665360).

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

15543120240 is a wasteful number, since it uses less digits than its factorization.

15543120240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3821 (or 3809 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 15543120240 its reverse (4202134551), we get a palindrome (19745254791).

The spelling of 15543120240 in words is "fifteen billion, five hundred forty-three million, one hundred twenty thousand, two hundred forty".