78648228128 has 24 divisors (see below), whose sum is σ = 156371761980. Its totient is φ = 38934764800.

The previous prime is 78648228107. The next prime is 78648228181. The reversal of 78648228128 is 82182284687.

It can be written as a sum of positive squares in 2 ways, for example, as 78326097424 + 322130704 = 279868^2 + 17948^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 12163883 + ... + 12170346.

Almost surely, 2^78648228128 is an apocalyptic number.

It is an amenable number.

78648228128 is a deficient number, since it is larger than the sum of its proper divisors (77723533852).

78648228128 is a wasteful number, since it uses less digits than its factorization.

78648228128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24334340 (or 24334332 counting only the distinct ones).

The product of its digits is 5505024, while the sum is 56.

The spelling of 78648228128 in words is "seventy-eight billion, six hundred forty-eight million, two hundred twenty-eight thousand, one hundred twenty-eight".