15984899457280 has 144 divisors (see below), whose sum is σ = 41239480242240. Its totient is φ = 5901350068224.

The previous prime is 15984899457257. The next prime is 15984899457283. The reversal of 15984899457280 is 8275499848951.

It is a self number, because there is not a number n which added to its sum of digits gives 15984899457280.

It is not an unprimeable number, because it can be changed into a prime (15984899457283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137105251 + ... + 137221789.

It is an arithmetic number, because the mean of its divisors is an integer number (286385279460).

Almost surely, 2^{15984899457280} is an apocalyptic number.

15984899457280 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 15984899457280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20619740121120).

15984899457280 is an abundant number, since it is smaller than the sum of its proper divisors (25254580784960).

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

15984899457280 is a wasteful number, since it uses less digits than its factorization.

15984899457280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124816 (or 124802 counting only the distinct ones).

The product of its (nonzero) digits is 2090188800, while the sum is 79.

The spelling of 15984899457280 in words is "fifteen trillion, nine hundred eighty-four billion, eight hundred ninety-nine million, four hundred fifty-seven thousand, two hundred eighty".