78372754656 has 384 divisors, whose sum is σ = 266615193600. Its totient is φ = 19634503680.

The previous prime is 78372754639. The next prime is 78372754703. The reversal of 78372754656 is 65645727387.

It is a happy number.

It is a super-2 number, since 2×78372754656² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78372754656.

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 63 ways as a sum of consecutive naturals, for example, 9099280 + ... + 9107888.

It is an arithmetic number, because the mean of its divisors is an integer number (694310400).

Almost surely, 2^78372754656 is an apocalyptic number.

78372754656 is a gapful number since it is divisible by the number (76) 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 78372754656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133307596800).

78372754656 is an abundant number, since it is smaller than the sum of its proper divisors (188242438944).

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

78372754656 is a wasteful number, since it uses less digits than its factorization.

78372754656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8702 (or 8694 counting only the distinct ones).

The product of its digits is 59270400, while the sum is 60.

The spelling of 78372754656 in words is "seventy-eight billion, three hundred seventy-two million, seven hundred fifty-four thousand, six hundred fifty-six".