78299896512 has 112 divisors (see below), whose sum is σ = 208922112000. Its totient is φ = 25879526400.

The previous prime is 78299896487. The next prime is 78299896523. The reversal of 78299896512 is 21569899287.

It is a happy number.

It is a super-2 number, since 2×78299896512² (a number of 23 digits) contains 22 as substring.

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, 30716614 + ... + 30719162.

It is an arithmetic number, because the mean of its divisors is an integer number (1865376000).

Almost surely, 2^78299896512 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 78299896512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104461056000).

78299896512 is an abundant number, since it is smaller than the sum of its proper divisors (130622215488).

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

78299896512 is a wasteful number, since it uses less digits than its factorization.

78299896512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854 (or 3844 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 66.

The spelling of 78299896512 in words is "seventy-eight billion, two hundred ninety-nine million, eight hundred ninety-six thousand, five hundred twelve".