78993290688 has 112 divisors (see below), whose sum is σ = 227929927680. Its totient is φ = 23997901824.

The previous prime is 78993290683. The next prime is 78993290699. The reversal of 78993290688 is 88609239987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78993290681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3120 + ... + 397487.

It is an arithmetic number, because the mean of its divisors is an integer number (2035088640).

Almost surely, 2^78993290688 is an apocalyptic number.

78993290688 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78993290688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113964963840).

78993290688 is an abundant number, since it is smaller than the sum of its proper divisors (148936636992).

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

78993290688 is a wasteful number, since it uses less digits than its factorization.

78993290688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400714 (or 400704 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 69.

The spelling of 78993290688 in words is "seventy-eight billion, nine hundred ninety-three million, two hundred ninety thousand, six hundred eighty-eight".