78650728736 has 12 divisors (see below), whose sum is σ = 154843622262. Its totient is φ = 39325364352.

The previous prime is 78650728721. The next prime is 78650728829. The reversal of 78650728736 is 63782705687.

It can be written as a sum of positive squares in only one way, i.e., 46416117136 + 32234611600 = 215444^2 + 179540^2 .

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 as a sum of consecutive naturals, namely, 1228917605 + ... + 1228917668.

Almost surely, 2^78650728736 is an apocalyptic number.

It is an amenable number.

78650728736 is a deficient number, since it is larger than the sum of its proper divisors (76192893526).

78650728736 is a wasteful number, since it uses less digits than its factorization.

78650728736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457835283 (or 2457835275 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 59.

The spelling of 78650728736 in words is "seventy-eight billion, six hundred fifty million, seven hundred twenty-eight thousand, seven hundred thirty-six".