78643650003 has 16 divisors (see below), whose sum is σ = 113388595200. Its totient is φ = 48295139456.

The previous prime is 78643649993. The next prime is 78643650011. The reversal of 78643650003 is 30005634687.

It is a cyclic number.

It is not a de Polignac number, because 78643650003 - 2¹⁴ = 78643633619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78643650023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16402203 + ... + 16406996.

It is an arithmetic number, because the mean of its divisors is an integer number (7086787200).

Almost surely, 2^78643650003 is an apocalyptic number.

78643650003 is a deficient number, since it is larger than the sum of its proper divisors (34744945197).

78643650003 is a wasteful number, since it uses less digits than its factorization.

78643650003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32809266.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 78643650003 in words is "seventy-eight billion, six hundred forty-three million, six hundred fifty thousand, three".