78899866540800 has 864 divisors, whose sum is σ = 270967234487040. Its totient is φ = 20202474700800.

The previous prime is 78899866540787. The next prime is 78899866540811. The reversal of 78899866540800 is 804566899887.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 33732306031 + ... + 33732308369.

It is an arithmetic number, because the mean of its divisors is an integer number (313619484360).

Almost surely, 2^{78899866540800} 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 78899866540800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135483617243520).

78899866540800 is an abundant number, since it is smaller than the sum of its proper divisors (192067367946240).

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

78899866540800 is a wasteful number, since it uses less digits than its factorization.

78899866540800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069 (or 3050 counting only the distinct ones).

The product of its (nonzero) digits is 1672151040, while the sum is 78.

The spelling of 78899866540800 in words is "seventy-eight trillion, eight hundred ninety-nine billion, eight hundred sixty-six million, five hundred forty thousand, eight hundred".