278743347872 has 72 divisors (see below), whose sum is σ = 603756151488. Its totient is φ = 126584712320.

The previous prime is 278743347833. The next prime is 278743347893.

278743347872 is nontrivially palindromic in base 10.

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 11 ways as a sum of consecutive naturals, for example, 4238183 + ... + 4303449.

It is an arithmetic number, because the mean of its divisors is an integer number (8385502104).

Almost surely, 2^278743347872 is an apocalyptic number.

278743347872 is a gapful number since it is divisible by the number (22) 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 278743347872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301878075744).

278743347872 is an abundant number, since it is smaller than the sum of its proper divisors (325012803616).

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

278743347872 is a wasteful number, since it uses less digits than its factorization.

278743347872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66402 (or 66383 counting only the distinct ones).

The product of its digits is 88510464, while the sum is 62.

The spelling of 278743347872 in words is "two hundred seventy-eight billion, seven hundred forty-three million, three hundred forty-seven thousand, eight hundred seventy-two".