5481665280 has 1080 divisors, whose sum is σ = 24867933552. Its totient is φ = 1142636544.

The previous prime is 5481665257. The next prime is 5481665353. The reversal of 5481665280 is 825661845.

It is a tau number, because it is divible by the number of its divisors (1080).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 66044119 + ... + 66044201.

Almost surely, 2^5481665280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5481665280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12433966776).

5481665280 is an abundant number, since it is smaller than the sum of its proper divisors (19386268272).

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

5481665280 is a wasteful number, since it uses less digits than its factorization.

5481665280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 5481665280 is about 74038.2690235259. The cubic root of 5481665280 is about 1763.2105310838.

It can be divided in two parts, 5481 and 665280, that added together give a square (670761 = 819²).

The spelling of 5481665280 in words is "five billion, four hundred eighty-one million, six hundred sixty-five thousand, two hundred eighty".