728244450155 has 4 divisors (see below), whose sum is σ = 873893340192. Its totient is φ = 582595560120.

The previous prime is 728244450133. The next prime is 728244450233. The reversal of 728244450155 is 551054442827.

728244450155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551054442827 = 7 ⋅78722063261.

It is not a de Polignac number, because 728244450155 - 2¹⁰ = 728244449131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72824445011 + ... + 72824445020.

It is an arithmetic number, because the mean of its divisors is an integer number (218473335048).

Almost surely, 2^728244450155 is an apocalyptic number.

728244450155 is a deficient number, since it is larger than the sum of its proper divisors (145648890037).

728244450155 is a wasteful number, since it uses less digits than its factorization.

728244450155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145648890036.

The product of its (nonzero) digits is 1792000, while the sum is 47.

The spelling of 728244450155 in words is "seven hundred twenty-eight billion, two hundred forty-four million, four hundred fifty thousand, one hundred fifty-five".