78330978900 has 216 divisors, whose sum is σ = 258743022720. Its totient is φ = 19766177280.

The previous prime is 78330978889. The next prime is 78330978983. The reversal of 78330978900 is 987903387.

It is a super-2 number, since 2×78330978900² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 18859224 + ... + 18863376.

Almost surely, 2^78330978900 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 78330978900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129371511360).

78330978900 is an abundant number, since it is smaller than the sum of its proper divisors (180412043820).

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

78330978900 is a wasteful number, since it uses less digits than its factorization.

78330978900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5295 (or 5285 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 78330978900 in words is "seventy-eight billion, three hundred thirty million, nine hundred seventy-eight thousand, nine hundred".