78643650792 has 32 divisors (see below), whose sum is σ = 224696145600. Its totient is φ = 22469614464.

The previous prime is 78643650781. The next prime is 78643650803. The reversal of 78643650792 is 29705634687.

It is an interprime number because it is at equal distance from previous prime (78643650781) and next prime (78643650803).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234058317 + ... + 234058652.

It is an arithmetic number, because the mean of its divisors is an integer number (7021754550).

Almost surely, 2^78643650792 is an apocalyptic number.

It is an amenable number.

78643650792 is an abundant number, since it is smaller than the sum of its proper divisors (146052494808).

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

78643650792 is a wasteful number, since it uses less digits than its factorization.

78643650792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468116985 (or 468116981 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 57.

The spelling of 78643650792 in words is "seventy-eight billion, six hundred forty-three million, six hundred fifty thousand, seven hundred ninety-two".