78854798988 has 216 divisors, whose sum is σ = 236801571552. Its totient is φ = 22052878848.

The previous prime is 78854798987. The next prime is 78854798993. The reversal of 78854798988 is 88989745887.

It is not an unprimeable number, because it can be changed into a prime (78854798987) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 57683881 + ... + 57685247.

It is an arithmetic number, because the mean of its divisors is an integer number (1096303572).

Almost surely, 2^78854798988 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 78854798988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118400785776).

78854798988 is an abundant number, since it is smaller than the sum of its proper divisors (157946772564).

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

78854798988 is a wasteful number, since it uses less digits than its factorization.

78854798988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061 (or 2049 counting only the distinct ones).

The product of its digits is 2601123840, while the sum is 81.

The spelling of 78854798988 in words is "seventy-eight billion, eight hundred fifty-four million, seven hundred ninety-eight thousand, nine hundred eighty-eight".