79943858400 has 576 divisors, whose sum is σ = 303820554240. Its totient is φ = 17882726400.

The previous prime is 79943858389. The next prime is 79943858431. The reversal of 79943858400 is 485834997.

It is a congruent number.

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, 189890190 + ... + 189890610.

It is an arithmetic number, because the mean of its divisors is an integer number (527466240).

Almost surely, 2^79943858400 is an apocalyptic number.

79943858400 is a gapful number since it is divisible by the number (70) 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 79943858400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151910277120).

79943858400 is an abundant number, since it is smaller than the sum of its proper divisors (223876695840).

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

79943858400 is a wasteful number, since it uses less digits than its factorization.

79943858400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 79943858400 in words is "seventy-nine billion, nine hundred forty-three million, eight hundred fifty-eight thousand, four hundred".