78256361285880 has 256 divisors, whose sum is σ = 244065965875200. Its totient is φ = 20058202644480.

The previous prime is 78256361285849. The next prime is 78256361285887. The reversal of 78256361285880 is 8858216365287.

It is a super-3 number, since 3×78256361285880³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78256361285887) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 179741412 + ... + 180176268.

It is an arithmetic number, because the mean of its divisors is an integer number (953382679200).

Almost surely, 2^{78256361285880} 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 78256361285880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122032982937600).

78256361285880 is an abundant number, since it is smaller than the sum of its proper divisors (165809604589320).

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

78256361285880 is a wasteful number, since it uses less digits than its factorization.

78256361285880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435454 (or 435450 counting only the distinct ones).

The product of its (nonzero) digits is 309657600, while the sum is 69.

The spelling of 78256361285880 in words is "seventy-eight trillion, two hundred fifty-six billion, three hundred sixty-one million, two hundred eighty-five thousand, eight hundred eighty".