78643650793 has 8 divisors (see below), whose sum is σ = 78804718848. Its totient is φ = 78482708304.

The previous prime is 78643650781. The next prime is 78643650803. The reversal of 78643650793 is 39705634687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78643650793 - 2²⁵ = 78610096361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78643650733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1277896 + ... + 1338022.

It is an arithmetic number, because the mean of its divisors is an integer number (9850589856).

Almost surely, 2^78643650793 is an apocalyptic number.

It is an amenable number.

78643650793 is a deficient number, since it is larger than the sum of its proper divisors (161068055).

78643650793 is a wasteful number, since it uses less digits than its factorization.

78643650793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62783.

The product of its (nonzero) digits is 22861440, while the sum is 58.

The spelling of 78643650793 in words is "seventy-eight billion, six hundred forty-three million, six hundred fifty thousand, seven hundred ninety-three".