79935529856 has 128 divisors (see below), whose sum is σ = 199997112000. Its totient is φ = 31622621184.

The previous prime is 79935529841. The next prime is 79935529871. The reversal of 79935529856 is 65892553997.

It is an interprime number because it is at equal distance from previous prime (79935529841) and next prime (79935529871).

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500726 + ... + 640778.

Almost surely, 2^79935529856 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 79935529856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99998556000).

79935529856 is an abundant number, since it is smaller than the sum of its proper divisors (120061582144).

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

79935529856 is a wasteful number, since it uses less digits than its factorization.

79935529856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140101 (or 140075 counting only the distinct ones).

The product of its digits is 183708000, while the sum is 68.

The spelling of 79935529856 in words is "seventy-nine billion, nine hundred thirty-five million, five hundred twenty-nine thousand, eight hundred fifty-six".