78782818752 has 560 divisors, whose sum is σ = 271848376800. Its totient is φ = 22295347200.

The previous prime is 78782818747. The next prime is 78782818799. The reversal of 78782818752 is 25781828787.

It is a self number, because there is not a number n which added to its sum of digits gives 78782818752.

It is a congruent number.

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 79 ways as a sum of consecutive naturals, for example, 175462624 + ... + 175463072.

It is an arithmetic number, because the mean of its divisors is an integer number (485443530).

Almost surely, 2^78782818752 is an apocalyptic number.

78782818752 is a gapful number since it is divisible by the number (72) 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 78782818752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135924188400).

78782818752 is an abundant number, since it is smaller than the sum of its proper divisors (193065558048).

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

78782818752 is a wasteful number, since it uses less digits than its factorization.

78782818752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 663 counting only the distinct ones).

The product of its digits is 28098560, while the sum is 63.

The spelling of 78782818752 in words is "seventy-eight billion, seven hundred eighty-two million, eight hundred eighteen thousand, seven hundred fifty-two".