78643650058 has 8 divisors (see below), whose sum is σ = 122033250180. Its totient is φ = 37965900000.

The previous prime is 78643650023. The next prime is 78643650073. The reversal of 78643650058 is 85005634687.

It can be written as a sum of positive squares in 2 ways, for example, as 76304670289 + 2338979769 = 276233^2 + 48363^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 78643649987 and 78643650014.

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, 677962443 + ... + 677962558.

Almost surely, 2^78643650058 is an apocalyptic number.

78643650058 is a deficient number, since it is larger than the sum of its proper divisors (43389600122).

78643650058 is a wasteful number, since it uses less digits than its factorization.

78643650058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355925032.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 78643650058 in words is "seventy-eight billion, six hundred forty-three million, six hundred fifty thousand, fifty-eight".