78398719296 has 56 divisors (see below), whose sum is σ = 218347320480. Its totient is φ = 24757489152.

The previous prime is 78398719291. The next prime is 78398719297. The reversal of 78398719296 is 69291789387.

It is a super-2 number, since 2×78398719296² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78398719296.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78398719291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10741791 + ... + 10749086.

Almost surely, 2^78398719296 is an apocalyptic number.

78398719296 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

78398719296 is an abundant number, since it is smaller than the sum of its proper divisors (139948601184).

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

78398719296 is a wasteful number, since it uses less digits than its factorization.

78398719296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21490911 (or 21490901 counting only the distinct ones).

The product of its digits is 82301184, while the sum is 69.

The spelling of 78398719296 in words is "seventy-eight billion, three hundred ninety-eight million, seven hundred nineteen thousand, two hundred ninety-six".