72105050285 has 4 divisors (see below), whose sum is σ = 86526060348. Its totient is φ = 57684040224.

The previous prime is 72105050249. The next prime is 72105050317. The reversal of 72105050285 is 58205050127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58205050127 = 7 ⋅8315007161.

It can be written as a sum of positive squares in 2 ways, for example, as 29341291849 + 42763758436 = 171293^2 + 206794^2 .

It is a cyclic number.

It is not a de Polignac number, because 72105050285 - 2⁶ = 72105050221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 7210505024 + ... + 7210505033.

It is an arithmetic number, because the mean of its divisors is an integer number (21631515087).

Almost surely, 2^72105050285 is an apocalyptic number.

It is an amenable number.

72105050285 is a deficient number, since it is larger than the sum of its proper divisors (14421010063).

72105050285 is a wasteful number, since it uses less digits than its factorization.

72105050285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14421010062.

The product of its (nonzero) digits is 28000, while the sum is 35.

The spelling of 72105050285 in words is "seventy-two billion, one hundred five million, fifty thousand, two hundred eighty-five".