78177284254280 has 128 divisors (see below), whose sum is σ = 190474283289600. Its totient is φ = 28776905468928.

The previous prime is 78177284254151. The next prime is 78177284254297. The reversal of 78177284254280 is 8245248277187.

It is a happy number.

It is a super-3 number, since 3×78177284254280³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14778782 + ... + 19358898.

It is an arithmetic number, because the mean of its divisors is an integer number (1488080338200).

Almost surely, 2^{78177284254280} 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 78177284254280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95237141644800).

78177284254280 is an abundant number, since it is smaller than the sum of its proper divisors (112296999035320).

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

78177284254280 is a wasteful number, since it uses less digits than its factorization.

78177284254280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580791 (or 4580787 counting only the distinct ones).

The product of its (nonzero) digits is 112394240, while the sum is 65.

The spelling of 78177284254280 in words is "seventy-eight trillion, one hundred seventy-seven billion, two hundred eighty-four million, two hundred fifty-four thousand, two hundred eighty".