728078078945 has 16 divisors (see below), whose sum is σ = 1018884777600. Its totient is φ = 499253538672.

The previous prime is 728078078941. The next prime is 728078078953. The reversal of 728078078945 is 549870870827.

728078078945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 728078078945 - 2² = 728078078941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728078078941) 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, 212265947 + ... + 212269376.

It is an arithmetic number, because the mean of its divisors is an integer number (63680298600).

Almost surely, 2^728078078945 is an apocalyptic number.

It is an amenable number.

728078078945 is a deficient number, since it is larger than the sum of its proper divisors (290806698655).

728078078945 is an equidigital number, since it uses as much as digits as its factorization.

728078078945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424535349 (or 424535335 counting only the distinct ones).

The product of its (nonzero) digits is 63221760, while the sum is 65.

The spelling of 728078078945 in words is "seven hundred twenty-eight billion, seventy-eight million, seventy-eight thousand, nine hundred forty-five".