78658728754 has 16 divisors (see below), whose sum is σ = 118425716640. Its totient is φ = 39183539040.

The previous prime is 78658728737. The next prime is 78658728791. The reversal of 78658728754 is 45782785687.

It is a self number, because there is not a number n which added to its sum of digits gives 78658728754.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5204749 + ... + 5219839.

It is an arithmetic number, because the mean of its divisors is an integer number (7401607290).

Almost surely, 2^78658728754 is an apocalyptic number.

78658728754 is a deficient number, since it is larger than the sum of its proper divisors (39766987886).

78658728754 is a wasteful number, since it uses less digits than its factorization.

78658728754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24585.

The product of its digits is 210739200, while the sum is 67.

The spelling of 78658728754 in words is "seventy-eight billion, six hundred fifty-eight million, seven hundred twenty-eight thousand, seven hundred fifty-four".