280479214656 has 168 divisors, whose sum is σ = 808580353880. Its totient is φ = 92955009024.

The previous prime is 280479214553. The next prime is 280479214657. The reversal of 280479214656 is 656412974082.

280479214656 is a `hidden beast` number, since 2 + 80 + 479 + 2 + 1 + 46 + 56 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 807469056 + 279671745600 = 28416^2 + 528840^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (280479214657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159998676 + ... + 160000428.

Almost surely, 2^280479214656 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 280479214656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404290176940).

280479214656 is an abundant number, since it is smaller than the sum of its proper divisors (528101139224).

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

280479214656 is a wasteful number, since it uses less digits than its factorization.

280479214656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213 (or 3200 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 280479214656 in words is "two hundred eighty billion, four hundred seventy-nine million, two hundred fourteen thousand, six hundred fifty-six".