78998841792 has 252 divisors, whose sum is σ = 246663798264. Its totient is φ = 24161679360.

The previous prime is 78998841791. The next prime is 78998841829. The reversal of 78998841792 is 29714889987.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 78998841792.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78998841791) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16838167 + ... + 16842857.

Almost surely, 2^78998841792 is an apocalyptic number.

78998841792 is a gapful number since it is divisible by the number (72) 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 78998841792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123331899132).

78998841792 is an abundant number, since it is smaller than the sum of its proper divisors (167664956472).

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

78998841792 is a wasteful number, since it uses less digits than its factorization.

78998841792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4908 (or 4882 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 72.

The spelling of 78998841792 in words is "seventy-eight billion, nine hundred ninety-eight million, eight hundred forty-one thousand, seven hundred ninety-two".