78997939200 has 1056 divisors, whose sum is σ = 314706107520. Its totient is φ = 19588055040.

The previous prime is 78997939193. The next prime is 78997939213. The reversal of 78997939200 is 293979987.

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, 951782359 + ... + 951782441.

Almost surely, 2^78997939200 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 78997939200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157353053760).

78997939200 is an abundant number, since it is smaller than the sum of its proper divisors (235708168320).

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

78997939200 is an equidigital number, since it uses as much as digits as its factorization.

78997939200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 15431472, while the sum is 63.

The spelling of 78997939200 in words is "seventy-eight billion, nine hundred ninety-seven million, nine hundred thirty-nine thousand, two hundred".