78643650794 has 8 divisors (see below), whose sum is σ = 117970745760. Its totient is φ = 39320068876.

The previous prime is 78643650781. The next prime is 78643650803. The reversal of 78643650794 is 49705634687.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821564 + ... + 912279.

It is an arithmetic number, because the mean of its divisors is an integer number (14746343220).

Almost surely, 2^78643650794 is an apocalyptic number.

78643650794 is a deficient number, since it is larger than the sum of its proper divisors (39327094966).

78643650794 is a wasteful number, since it uses less digits than its factorization.

78643650794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756524.

The product of its (nonzero) digits is 30481920, while the sum is 59.

The spelling of 78643650794 in words is "seventy-eight billion, six hundred forty-three million, six hundred fifty thousand, seven hundred ninety-four".