79834947840 has 864 divisors, whose sum is σ = 306521510400. Its totient is φ = 19913527296.

The previous prime is 79834947839. The next prime is 79834947853. The reversal of 79834947840 is 4874943897.

79834947840 is a `hidden beast` number, since 7 + 9 + 83 + 49 + 478 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1010568921 + ... + 1010568999.

Almost surely, 2^79834947840 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 79834947840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153260755200).

79834947840 is an abundant number, since it is smaller than the sum of its proper divisors (226686562560).

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

79834947840 is an frugal number, since it uses more digits than its factorization.

79834947840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 63.

The spelling of 79834947840 in words is "seventy-nine billion, eight hundred thirty-four million, nine hundred forty-seven thousand, eight hundred forty".