78857428800 has 168 divisors, whose sum is σ = 258929623872. Its totient is φ = 21011456000.

The previous prime is 78857428789. The next prime is 78857428883. The reversal of 78857428800 is 882475887.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6526765 + ... + 6538835.

Almost surely, 2^78857428800 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 78857428800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129464811936).

78857428800 is an abundant number, since it is smaller than the sum of its proper divisors (180072195072).

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

78857428800 is a wasteful number, since it uses less digits than its factorization.

78857428800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13457 (or 13442 counting only the distinct ones).

The product of its (nonzero) digits is 8028160, while the sum is 57.

The spelling of 78857428800 in words is "seventy-eight billion, eight hundred fifty-seven million, four hundred twenty-eight thousand, eight hundred".