78068555520 has 432 divisors, whose sum is σ = 262110377760. Its totient is φ = 19787120640.

The previous prime is 78068555519. The next prime is 78068555569. The reversal of 78068555520 is 2555586087.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 716225226 + ... + 716225334.

Almost surely, 2^78068555520 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 78068555520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131055188880).

78068555520 is an abundant number, since it is smaller than the sum of its proper divisors (184041822240).

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

78068555520 is a wasteful number, since it uses less digits than its factorization.

78068555520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 3360000, while the sum is 51.

The spelling of 78068555520 in words is "seventy-eight billion, sixty-eight million, five hundred fifty-five thousand, five hundred twenty".