278798607611328 has 1120 divisors, whose sum is σ = 966511511159040. Its totient is φ = 70478100725760.

The previous prime is 278798607611269. The next prime is 278798607611351. The reversal of 278798607611328 is 823116706897872.

It is a self number, because there is not a number n which added to its sum of digits gives 278798607611328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 19505947350 + ... + 19505961642.

It is an arithmetic number, because the mean of its divisors is an integer number (862956706392).

Almost surely, 2^{278798607611328} is an apocalyptic number.

278798607611328 is a gapful number since it is divisible by the number (28) 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 278798607611328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483255755579520).

278798607611328 is an abundant number, since it is smaller than the sum of its proper divisors (687712903547712).

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

278798607611328 is a wasteful number, since it uses less digits than its factorization.

278798607611328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14503 (or 14472 counting only the distinct ones).

The product of its (nonzero) digits is 682795008, while the sum is 75.

The spelling of 278798607611328 in words is "two hundred seventy-eight trillion, seven hundred ninety-eight billion, six hundred seven million, six hundred eleven thousand, three hundred twenty-eight".