279996643056 has 640 divisors, whose sum is σ = 918901186560. Its totient is φ = 72459878400.

The previous prime is 279996643019. The next prime is 279996643103. The reversal of 279996643056 is 650346699972.

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 127 ways as a sum of consecutive naturals, for example, 256172046 + ... + 256173138.

It is an arithmetic number, because the mean of its divisors is an integer number (1435783104).

Almost surely, 2^279996643056 is an apocalyptic number.

279996643056 is a gapful number since it is divisible by the number (26) 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 279996643056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459450593280).

279996643056 is an abundant number, since it is smaller than the sum of its proper divisors (638904543504).

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

279996643056 is a wasteful number, since it uses less digits than its factorization.

279996643056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 132269760, while the sum is 66.

The spelling of 279996643056 in words is "two hundred seventy-nine billion, nine hundred ninety-six million, six hundred forty-three thousand, fifty-six".