278720604016 has 80 divisors (see below), whose sum is σ = 586452607488. Its totient is φ = 127812787200.

The previous prime is 278720603981. The next prime is 278720604031. The reversal of 278720604016 is 610406027872.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 15 ways as a sum of consecutive naturals, for example, 5013331 + ... + 5068621.

Almost surely, 2^278720604016 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 278720604016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293226303744).

278720604016 is an abundant number, since it is smaller than the sum of its proper divisors (307732003472).

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

278720604016 is a wasteful number, since it uses less digits than its factorization.

278720604016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55790 (or 55784 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 278720604016 in words is "two hundred seventy-eight billion, seven hundred twenty million, six hundred four thousand, sixteen".