78643585754 has 16 divisors (see below), whose sum is σ = 122273428608. Its totient is φ = 37910750592.

The previous prime is 78643585747. The next prime is 78643585759. The reversal of 78643585754 is 45758534687.

It is not an unprimeable number, because it can be changed into a prime (78643585759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6237239 + ... + 6249834.

It is an arithmetic number, because the mean of its divisors is an integer number (7642089288).

Almost surely, 2^78643585754 is an apocalyptic number.

78643585754 is a deficient number, since it is larger than the sum of its proper divisors (43629842854).

78643585754 is a wasteful number, since it uses less digits than its factorization.

78643585754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12487189.

The product of its digits is 112896000, while the sum is 62.

The spelling of 78643585754 in words is "seventy-eight billion, six hundred forty-three million, five hundred eighty-five thousand, seven hundred fifty-four".