78504135126824 has 64 divisors (see below), whose sum is σ = 165829597401600. Its totient is φ = 34517388729600.

The previous prime is 78504135126773. The next prime is 78504135126883. The reversal of 78504135126824 is 42862153140587.

It is a self number, because there is not a number n which added to its sum of digits gives 78504135126824.

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 15 ways as a sum of consecutive naturals, for example, 151547 + ... + 12531210.

It is an arithmetic number, because the mean of its divisors is an integer number (2591087459400).

Almost surely, 2^{78504135126824} 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 78504135126824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82914798700800).

78504135126824 is an abundant number, since it is smaller than the sum of its proper divisors (87325462274776).

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

78504135126824 is a wasteful number, since it uses less digits than its factorization.

78504135126824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12685074 (or 12685070 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 56.

The spelling of 78504135126824 in words is "seventy-eight trillion, five hundred four billion, one hundred thirty-five million, one hundred twenty-six thousand, eight hundred twenty-four".