4278278082780 has 144 divisors (see below), whose sum is σ = 13979691180000. Its totient is φ = 1052814491136.

The previous prime is 4278278082773. The next prime is 4278278082817. The reversal of 4278278082780 is 872808728724.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8008471 + ... + 8525969.

It is an arithmetic number, because the mean of its divisors is an integer number (97081188750).

Almost surely, 2^{4278278082780} 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 4278278082780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6989845590000).

4278278082780 is an abundant number, since it is smaller than the sum of its proper divisors (9701413097220).

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

4278278082780 is a wasteful number, since it uses less digits than its factorization.

4278278082780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521060 (or 521055 counting only the distinct ones).

The product of its (nonzero) digits is 44957696, while the sum is 63.

The spelling of 4278278082780 in words is "four trillion, two hundred seventy-eight billion, two hundred seventy-eight million, eighty-two thousand, seven hundred eighty".