280536540480 has 2016 divisors, whose sum is σ = 1270363191552. Its totient is φ = 58525286400.

The previous prime is 280536540439. The next prime is 280536540481. The reversal of 280536540480 is 84045635082.

280536540480 is a `hidden beast` number, since 2 + 80 + 53 + 6 + 5 + 40 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (2016).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280536540481) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 3951218845 + ... + 3951218915.

It is an arithmetic number, because the mean of its divisors is an integer number (630140472).

Almost surely, 2^280536540480 is an apocalyptic number.

280536540480 is a gapful number since it is divisible by the number (20) 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 280536540480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635181595776).

280536540480 is an abundant number, since it is smaller than the sum of its proper divisors (989826651072).

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

280536540480 is a wasteful number, since it uses less digits than its factorization.

280536540480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 280536540480 in words is "two hundred eighty billion, five hundred thirty-six million, five hundred forty thousand, four hundred eighty".