2728203273665 has 32 divisors (see below), whose sum is σ = 3437209036800. Its totient is φ = 2076351436800.

The previous prime is 2728203273641. The next prime is 2728203273671. The reversal of 2728203273665 is 5663723028272.

It is a happy number.

2728203273665 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 2728203273665 - 2³⁸ = 2453325366721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1631300 + ... + 2849130.

It is an arithmetic number, because the mean of its divisors is an integer number (107412782400).

Almost surely, 2^{2728203273665} is an apocalyptic number.

It is an amenable number.

2728203273665 is a deficient number, since it is larger than the sum of its proper divisors (709005763135).

2728203273665 is a wasteful number, since it uses less digits than its factorization.

2728203273665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218113.

The product of its (nonzero) digits is 10160640, while the sum is 53.

The spelling of 2728203273665 in words is "two trillion, seven hundred twenty-eight billion, two hundred three million, two hundred seventy-three thousand, six hundred sixty-five".